Greek Olives: The Varieties, the Register, and What a Name Guarantees
A Greek olive is the default olive of the Western deli counter, and the phrase covers considerably more ground than most jars admit. Greece grows dozens of cultivars, cures them in several genuinely different ways, and carries eleven separate table-olive names on the European Union's geographical indications register — one of which is not the kind of protection most people assume it is. This article sets out which Greek olives you will actually meet, what the register says about each protected name, and what that name on a jar does and does not commit a producer to. We pulled the register in full and read the registration dossiers rather than repeating what other guides say about them.
For our own oil, see our cold-pressed organic Marrakech olive oil. We do not sell table olives, and nothing here is trying to sell you any.
The Short Answer
- Greece has eleven registered table-olive names, not one. We pulled all 4,011 entries from the European Commission's eAmbrosia register on 28 August 2026 and filtered them: eleven Greek entries sit in the fruit, vegetables and cereals product category, across four cultivars and eleven separate files.
- Ten are PDOs and one is a PGI. Κονσερβολιά Άρτας / Konservolia Artas is a Protected Geographical Indication, file number PGI-GR-0349. The five other Konservolia names are Protected Designations of Origin, a tighter tie between product and place.
- Four cultivars do nearly all the work. Kalamon, the dark almond-shaped fruit; Konservolia, the round green-to-black one; Chalkidiki, the very large green one usually sold stuffed; and Throumba, the small wrinkled one.
- Throumba loses its bitterness on the tree. The registered dossier for Θρούμπα Θάσου attributes the debittering to a hydrolytic reaction caused by the fungus Phoma oleae, with the fruit picked fully ripe or overripe and then salted at 30–40% coarse salt.
- The dossiers are short, old, and several are readable in English. The 1996 registration summaries we read run to about a page and describe the cure in one or two sentences each.
- One place name can carry several unrelated registrations. Chalkidiki appears on the register four times — table olives, two separate olive oils and a wine — and Thasos three times.
- Sidr & Stone sells olive oil, not olives. The habit that carries across is the same one: read the registration and the specification, not the adjective on the front of the pack.
What Makes an Olive a Greek Olive
A Greek olive is fruit of Olea europaea grown in Greece and cured for the table, usually from one of four cultivars: Kalamon, Konservolia, Chalkidiki or Throumba. The word describes origin and cultivar rather than any single processing method, and only some Greek olives carry a protected designation tying them to a defined area.
Three things get collapsed into the one phrase, and separating them is most of the work. There is the species, which is Olea europaea L. of the family Oleaceae — the botanical register of record, Kew's Plants of the World Online, carries it under IPNI identifier 610675-1 and lists no cultivars at all, because cultivar names are horticultural rather than taxonomic. There is the cultivar, a grower's category maintained by propagation rather than by any botanical authority. And there is the designation, a legal instrument tying a named product to a named place under a published specification.
A jar can be honest about all three, one of them, or none. The olive itself is inedible off the tree in every case — the bitterness is oleuropein, and removing it is the whole point of curing, a process our piece on olives and oil covers in general terms.
The Four Greek Table Olives You Will Actually Meet
Greek olive marketing gestures at dozens of varieties. In practice, four account for nearly everything sold abroad, and each has its own habit of cure. The descriptions in the right-hand column below are taken from the registration dossiers themselves, not from tasting notes.
| Cultivar | Where it is registered | The fruit | How the registered dossier describes the cure |
|---|---|---|---|
| Kalamon (anglicised Kalamata) | Elia Kalamatas, PDO-GR-0030, Messinia | Large, almond-shaped, black to deep purple | Hand-picked fully ripe and black, then scored, washed and soaked in brine to ripen |
| Konservolia | Six designations across Fthiotida, Fokida, Magnesia, Evia and Arta | Round, medium to large, green through to black | Held in a sodium chloride solution for months; at Amfissa, four months, then preserved in salt |
| Chalkidiki | Prasines Elies Chalkidikis, PDO-GR-0539 | Very large, firm, bright green; usually sold stoned or stuffed | Not stated here — no English summary sheet is published against this file (see below) |
| Throumba | Three designations: Thasos, Chios, Ampadia in Rethymno | Small, wrinkled, brown-black, dry-looking | Debittered on the tree by a hydrolytic reaction, then salted at 30–40% and aired |
The Kalamon fruit is the one most people picture, and it has a second designation problem all of its own — the oil sold as Kalamata is a different registration made from a different variety. Our guide to Kalamata olives works through the fruit, and Kalamata olive oil works through the bottle.
The Eleven Registered Names, in Full
This is the part almost no shopping guide prints, and it takes about ten minutes to check. We pulled the whole eAmbrosia register — 4,011 entries — on 28 August 2026 and filtered for Greek entries in product category 147, fruit, vegetables and cereals. Every one of the eleven was shown as registered, with no removal flag and no amendment in progress on the day we looked.
| Registered name | File number | Type | Protected from |
|---|---|---|---|
| Ελιά Καλαμάτας / Elia Kalamatas | PDO-GR-0030 | PDO | 21 June 1996 |
| Θρούμπα Αμπαδιάς Ρεθύμνης Κρήτης / Throumpa Ampadias Rethymnis Kritis | PDO-GR-0031 | PDO | 2 July 1996 |
| Κονσερβολιά Στυλίδας / Konservolia Stylidas | PDO-GR-0345 | PDO | 2 July 1996 |
| Κονσερβολιά Αμφίσσης / Konservolia Amfissis | PDO-GR-0346 | PDO | 2 July 1996 |
| Κονσερβολιά Πηλίου Βόλου / Konservolia Piliou Volou | PDO-GR-0347 | PDO | 24 January 1997 |
| Κονσερβολιά Ροβίων / Konservolia Rovion | PDO-GR-0348 | PDO | 2 July 1996 |
| Κονσερβολιά Άρτας / Konservolia Artas | PGI-GR-0349 | PGI | 2 July 1996 |
| Θρούμπα Χίου / Throumpa Chiou | PDO-GR-0350 | PDO | 2 July 1996 |
| Θρούμπα Θάσου / Throumpa Thassou | PDO-GR-0351 | PDO | 2 July 1996 |
| Κονσερβολιά Αταλάντης / Konservolia Atalantis | PDO-GR-0356 | PDO | 2 July 1996 |
| Πράσινες Ελιές Χαλκιδικής / Prasines Elies Chalkidikis | PDO-GR-0539 | PDO | 27 March 2006 |
Two details are worth pulling out. Ten of the eleven were protected within eight months of each other in 1996 and 1997, in the first great wave of Greek registrations; only Chalkidiki's green olives came later, in 2006. And Konservolia Artas is a PGI rather than a PDO — a real difference, because a PDO requires the whole production process to happen in the defined area while a PGI requires only one stage of it. Guides that describe six Konservolia PDOs have miscounted by one.
What the Registration Dossiers Actually Say
The registered documents behind these names are not long. Several of the files publish an English-language summary sheet on eAmbrosia, each running to roughly a page, and we read them rather than paraphrasing other people's summaries of them.
Elia Kalamatas was applied for by the Union of Agricultural Cooperatives of the Prefecture of Messinia. The product is described simply as "table olives" of the Kalamata variety, from the administrative boundaries of Messinia. The olives are "picked from the tree by hand when fully ripe and black in colour", then "scored, washed and soaked in brine to ripen" — and the summary adds that the finished product "is distributed in tins filled with extra virgin Kalamata olive oil", which quietly links the fruit designation to the oil one.
Konservolia Amfissis came from the Union of Agricultural Cooperatives of the Fokida Prefecture, covering Amfissa, Itea and Delphi and a list of named communes. Its production method is one sentence: after harvesting at ripening the olives "are stored in tanks in a solution of NaCl for 4 months", then preserved in salt.
Konservolia Artas, the PGI, is more specific about logistics than any of the others. Picked by hand, the olives "go to the factories on the same day for quality control and grading by size", then into ten-tonne plastic tanks of salt solution to ferment — twenty to sixty days for green fruit, four to five months for yellow and black.
Throumpa Thassou is the one that repays reading. Its summary states that "owing to the presence of the fungus Phoma oleae the Throumba variety loses its bitterness of taste by a hydrolytic reaction" — that is, the fruit debitters itself while still hanging. It is then harvested fully ripe or overripe, washed, graded, packed with coarse salt at 30–40%, and ready in thirty to forty days after air exposure improves the colour by oxidation.
All four dossiers carry the same line about pest control: the olive fruit fly is treated by bait-spraying from the ground using biological methods, or is not treated at all. Two honest limits. The Kalamata dossier files the product under the old classification heading "1.6 Fats" while the other three use "1.6 Fruit and vegetables", which looks like a clerical inconsistency in the original 1990s paperwork rather than anything substantive — but we have not seen it explained anywhere and we are not going to guess. And no English summary sheet is published against Prasines Elies Chalkidikis, so we have not read its specification and will not tell you what it says.
One Place, Several Registers
The most useful habit this topic teaches is checking which register a famous word actually sits on. A Greek place name will often carry several unrelated protected products, and the shelf gives you no warning.
| Place | Registered name | File number | What it actually covers |
|---|---|---|---|
| Kalamata | Elia Kalamatas | PDO-GR-0030 | The table olive |
| Kalamata | Καλαμάτα / Kalamata | PDO-GR-0037 | The olive oil, filed under oils and fats |
| Kalamata | Ούζο Καλαμάτας / Ouzo of Kalamata | PGI-GR-01840 | A spirit drink geographical indication |
| Chalkidiki | Prasines Elies Chalkidikis | PDO-GR-0539 | The green table olive |
| Chalkidiki | Αγουρέλαιο Χαλκιδικής / Agoureleo Chalkidikis | PDO-GR-0736 | An early-harvest olive oil |
| Chalkidiki | Γαλανό Μεταγγιτσίου Χαλκιδικής / Galano Metaggitsiou Chalkidikis | PDO-EL-1027 | A second, separate olive oil |
| Chalkidiki | Χαλκιδική | PGI-GR-A1403 | A wine geographical indication |
| Thasos | Throumpa Thassou | PDO-GR-0351 | The table olive |
| Thasos | Θάσος / Thassos | PGI-GR-0377 | An olive oil |
| Thasos | Θάσος | PGI-GR-A0121 | A wine geographical indication |
| Atalanti | Konservolia Atalantis | PDO-GR-0356 | The table olive |
| Atalanti | Κοιλάδα Αταλάντης | PGI-GR-A1521 | A wine geographical indication |
Chios is busier still: alongside Throumpa Chiou the island carries designations for mastic, mastic oil, mastic chewing gum, mandarins and a mastic spirit drink. The file number prefix is the giveaway every time. PDO, PGI and the spirit-drink and wine indications are different instruments with different rules, and a name protected as one is not protected as the others.
The Objections Worth Taking Seriously
"You sell olive oil, so of course you say the paperwork matters." We do sell oil, and we sell no table olives at all, so there is nothing on this page for us to steer you towards. We would rather name that than have you notice it quietly. The reason we wrote it is that the Greek table-olive register is the clearest worked example on any food shelf of a name doing several jobs at once, and the lesson transfers straight to the oil aisle.
"These dossiers are thirty years old, so they cannot mean much." That is a fair observation and a real limit. Ten of the eleven were registered in 1996 and 1997, the summaries are short, and a one-sentence production method leaves a great deal unsaid. What they still do is bind a name to a defined area and to whatever the full specification says. Specifications can be amended, and none of the eleven showed an amendment in progress when we checked on 28 August 2026.
"Surely a designation means better olives." It does not, and this is the point that generalises furthest. A PDO or PGI ties a product to a place and a process. It says nothing about whether this jar was packed last season or three years ago, how it was stored, or whether the producer is any good. Origin marks are a floor, not a verdict — the same argument our guide to Koroneiki makes about single-cultivar oils.
One question we are not going to answer is which Greek olive is healthiest. These are foods, the compositional differences between cured olives are modest, they are salty by construction, and none of them is a treatment for anything. If you want the nutrition question settled, that is a conversation for a qualified professional and not for a shelf.
Why Sidr & Stone
We came at this sideways. A reader asked whether Greek olives and Greek olive oil were the same product, the honest answer turned out to be a register lookup, and the register turned out to be more interesting than the question. That is the whole of our claim to authority here: we read the primary documents, we say plainly which ones we could not read, and we tell you what we found. Our own product is oil, and it is deliberately unexciting in composition.
- Single-estate — one family-owned grove on the plains outside Marrakech, Morocco, with no blending across origins.
- Rain-fed — no irrigation; the trees take what the season gives them.
- Organically grown — no synthetic fertilisers, pesticides or herbicides. We do not hold a formal organic certificate and we do not claim one.
- Single harvest — a small batch, once a season, picked when the fruit is ready rather than when the calendar says so.
- Cold-pressed within hours of harvest — flavour, aroma and polyphenols preserved by keeping the gap between picking and pressing short.
- Unfiltered extra virgin — minimally processed, and it may show natural sediment, which is normal for an unfiltered oil.
- 100% natural — one ingredient, with nothing added to it.
- 500 ml dark glass with a gold label — protective packaging in a size built to be finished fresh.
- Halal certified, with 10% of profits to charity as a brand-wide commitment.
- Fulfilment in the UK, EU, and US.
We will not tell you Sidr & Stone is the best olive oil — that would be exactly the sort of unbacked adjective this article is about. We publish no polyphenol figure for our oil yet, and we would rather say so plainly than imply one. What we will say is that it is single-estate Moroccan, rain-fed, organically grown and cold-pressed within hours of harvest. For the wider set of things a bottle can genuinely tell you, see our guide to choosing a quality olive oil.
Frequently Asked Questions
What is a Greek olive?
It is fruit of Olea europaea grown in Greece and cured for the table, most often from the Kalamon, Konservolia, Chalkidiki or Throumba cultivars. Eleven Greek table-olive names hold a protected designation on the European Union register; most Greek olives sold abroad do not.
What are the main types of Greek olives?
Four. Kalamon, large and almond-shaped and deep purple-black; Konservolia, round and sold both green and black; Chalkidiki, very large, firm and green, usually stoned or stuffed; and Throumba, small, wrinkled and dry-cured.
What is the difference between Kalamata and Halkidiki olives?
Cultivar, colour and cure. Kalamon fruit is picked fully ripe and black and fermented whole in brine. Chalkidiki fruit is picked green and firm and is the variety usually sold pitted or stuffed. They hold separate designations, PDO-GR-0030 and PDO-GR-0539.
Are all Greek olives protected by a PDO?
No. Eleven Greek table-olive names are registered — ten as Protected Designations of Origin and one, Konservolia Artas, as a Protected Geographical Indication. Everything else grown and cured in Greece is sold without a designation, which is legal and common.
What is a Throumba olive?
A Greek olive that debitters itself on the tree. The registered dossier for Throumpa Thassou attributes this to a hydrolytic reaction caused by the fungus Phoma oleae. The fruit is picked fully ripe or overripe, then salted at 30–40% coarse salt and aired, which is why it looks wrinkled.
Is Konservolia the same as Amfissa olives?
Amfissa is one place where Konservolia is grown, not a separate variety. The registered name is Konservolia Amfissis, PDO-GR-0346, covering Amfissa, Itea and Delphi and several named communes of Fokida. Five other Konservolia designations cover other Greek areas.
Does Sidr & Stone sell Greek olives?
No. We sell a single-estate Moroccan extra virgin olive oil and no table olives of any kind. This article exists because the Greek register is the clearest available lesson in reading a designation, and that lesson transfers directly to buying oil.
Is olive oil a medicine?
No. Olive oil is a food, not a medicine. It has a long traditional history — including being honoured in the Prophetic Sunnah — and a substantial body of modern research, particularly around polyphenols, cardiovascular health, and the Mediterranean diet pattern. It can be a worthwhile part of a healthy routine, but it does not cure diseases and is not a substitute for medical care. Be cautious of any olive oil marketed with specific disease-cure claims.
Final Thoughts
Greek olives are a good example of a category where the interesting information is all one layer below the marketing. Four cultivars, eleven registered names, four different habits of cure, and a register that will tell you in two minutes whether the word on the jar is doing legal work or decorative work. None of that requires expertise. It requires knowing that the register exists.
The two practical habits are small. If origin is what you are buying, look for the PDO or PGI symbol and the registered name rather than the place name on its own. And read how the olive was cured, because a brine-fermented olive and a dry-salted one are genuinely different foods that happen to share a colour.
That is the same discipline we apply in our own aisle, where a cultivar guide or a look at what single-estate actually commits a producer to does more for a buyer than any adjective. Our cold-pressed organic Marrakech olive oil — single-estate, rain-fed, organically grown and unfiltered — is available to pre-order, with fulfilment in the UK, EU, and US. First harvest, estimated shipping from November 2026.
Pre-Order Sidr & Stone Organic Marrakech Olive Oil — Limited First Harvest →
Disclaimer: This article describes the Greek table-olive designations recorded on the European Union's eAmbrosia register and the registration summaries published against them as they stood on 28 August 2026; register entries, specifications and commercial practice may change, and readers should check current sources. Comparisons are made in good faith and in fair terms. Olive oil is a food, not a medicine, and is not a substitute for medical treatment of any condition. For any health concern, consult a qualified medical professional.