What Are Mastic Gum Crystals?

In short: Mastic gum crystals are the natural resin "tears" of the mastic tree (Pistacia lentiscus), produced only on the Greek island of Chios. You can chew them like a natural gum or grind them as a spice — and as a food supplement, mastic contributes to the normal function of the digestive system.

In this article

  1. What are mastic crystals?
  2. Choose your crystal size
  3. In the kitchen
  4. Properties of mastic crystals
  5. How to use & store
  6. FAQ

What are mastic crystals?

Mastic trees produce mastic crystals — "tears" — which dry on and under the tree, are hand-picked, and are then packed as crystals or ground into a powder used as a food supplement.

Taste and aroma

A mastic crystal has a distinctive, unmistakable aroma and taste — somewhat like herbal pine. The flavour becomes refreshing as you chew, which is why mastic has been chewed since antiquity as the original natural chewing gum.

Mastic gum crystals (tears of Chios)

Choose your crystal size

Mastic tears come in three sizes. It is the same authentic Chios mastic — the difference is the size of the crystals and how you'll use them: larger tears are softer inside and best for chewing, while smaller tears are firmer and ideal for grinding as a spice.

Large tears

Diameter >8 mm

The best for chewing. Big crystals are softer inside, so they're the most pleasant to chew — and the classic gift choice.

Want the nicest crystals to chew?

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Medium tears Most popular

Diameter 6–8 mm

The everyday all-rounder. A balanced size that's easy to chew daily — our most popular choice.

Looking for the perfect everyday chew?

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Small tears

Diameter 3–5 mm

Best for cooking. Smaller, firmer pieces that are easy to grind — ideal as a spice for sweets and bakes, or as a starter size.

Cooking or grinding into powder?

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Browse every size in the raw mastic collection.

In the kitchen

Mastic freshens the breath and is also used as a base in cosmetics and as a spice. In cooking it flavours the traditional New Year cake Vasilopita, the sweet bread tsoureki, biscuits and cakes, and is used in preserves, liqueurs, lemonades and ice cream.

Properties of mastic crystals

100% pure natural resin A rare natural substance No industrial processing PDO product UNESCO Intangible Cultural Heritage Vegan Lactose-free Gluten-free

Mastic resin has a long tradition of use for mild digestive complaints, reflected in a European Medicines Agency (EMA) herbal monograph (HMPC). As a food supplement, mastic contributes to the normal function of the digestive system.

How to use & store

Frequently asked questions

What are mastic gum crystals?

They are the natural resin "tears" of the mastic tree from Chios, hand-picked and packed as crystals or ground into powder. You can chew them or use them as a spice.

Which size of mastic crystals is best for chewing?

Larger crystals (>8 mm) are softer inside and the nicest to chew. Smaller crystals (3–5 mm) are firmer and better suited to grinding as a spice; medium (6–8 mm) is the popular everyday choice.

Can you eat mastic crystals?

Yes. Mastic crystals can be chewed or used in cooking. As a food supplement, mastic contributes to the normal function of the digestive system.

What do mastic crystals taste like?

They have a distinctive woody-sweet, pine-like aroma and taste that becomes refreshing as you chew.

Taste the real thing — authentic Chios mastic crystals, straight from the island.

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Mastic for your gastrointestinal tract