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
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.

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?
Shop large tearsMedium 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?
Shop medium tearsSmall 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?
Shop small tearsBrowse 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
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
- Store in a cool, dry place
- Instructions for chewing mastic
- Grinding mastic into a spice
- 100% mastic resin crystals from the island of Chios
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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