What are green olives, and how do they differ from black?

Green olives do not come from a different tree. They are the same fruit picked early. As an olive ripens it turns from green to straw yellow, then pink-purple and finally black. Where on that line the harvest falls decides what the product is called.

What sets the colour?

The change comes from chlorophyll declining and purple-black pigments called anthocyanins accumulating. In fruit that blackens on the tree the colour moves inward from the skin, but the pit stays pale — the strongest way to separate natural black from artificial blackening. We cover the methods separately.

The real differences

The oil gap is concrete: the registration document for Antalya Tavşan Yüreği gives 9-20.2 percent at the green stage and 25 percent at black maturity.

Why pick green?

In table production a low oil share is wanted, because oily fruit softens faster in brine. Green fruit is firmer and stands transport and processing better; stuffed olives are only possible with that firmness. Picking earlier also tires the tree less for the following year's crop.

Which varieties suit green table use?

The deciding measures are flesh ratio and size. In our records Mavi leads at 91.4 percent, Hojiblanca 90 and Kalamata 89.4; on flesh-to-pit Hojiblanca is first at 8.98. On size, Karamürsel Su reaches 9.44 grams.

It cannot be eaten off the tree

Fresh green olives are bitter because of oleuropein. Three methods remove it: Spanish-style alkali treatment (weeks), natural brine (6-12 months) and scoring (days). Details in how green table olives are made.

Calories

The gap between green and black is small; size and brining decide more. One medium olive is about 4-5 calories and 100 grams of brined olives 115-145.

How to store green olives

Keep an opened jar refrigerated with the fruit always below the brine. Any that rise meet air and mould. Top up with salted water that has been boiled and cooled; a finger of olive oil on top is the simplest way to cut off air.

Use glass or food-grade plastic. Never use metal — acidic brine reacts with it and the result carries into taste and colour.

Forms on the shelf

The same green olive reaches the shelf in several forms: whole with pit, scored or cracked, pitted, and stuffed with pepper, almond or lemon peel. Stuffing needs large, firm fruit, so not every variety suits it.

Calibre — count per kilogram — sets the price directly. A lower count means larger fruit.

Which is healthier, green or black?

They are the same fruit and their nutrient profiles largely overlap. Black tends to carry more iron and copper; green typically holds more polyphenols, some of which give the bitterness. In both, salt matters more: brining method and time change sodium far more than any varietal difference.