Mastic of Chios: The Fragrant Tears of the Aegean

The Geography of a Singular Resin

Across the southern tip of Chios, an island anchored in the eastern Aegean just off the coast of Asia Minor, grows an unassuming evergreen bush that has generated wealth and conflict for millennia. Pistacia lentiscus var. chia is a specific variant of the common lentisc shrub. While lentisc bushes grow wild across the Mediterranean basin, only the shrubs cultivated in southern Chios produce significant quantities of clear, fragrant, aromatic resin that hardens upon contact with the air.

This southern microclimate, sheltered by rolling hills and defined by dry limestone soil and hot, arid summers, creates the precise conditions required for the plant to weep effectively. The northern villages of the island have tried repeatedly over centuries to cultivate the resin-bearing shrubs, with little success; the plants grow, but their yield of usable gum remains minimal. The production is confined to approximately twenty-four settlements collectively known as the Mastichochoria, or mastic villages, including Pyrgi, Mesta, Olympoi, and Kalamoti.

Architecture Built on a Monopoly

The value of mastic resin in the medieval and early modern periods turned the Mastichochoria into prime targets for Aegean corsairs and rival empires. When the Genoese trading company of the Giustiniani took control of Chios in the fourteenth century, they reorganised the southern settlements into fortified communes to secure the monopoly and defend the harvest against seaborne raids.

Villages like Mesta and Pyrgi were built with outer perimeter walls formed by the windowless backs of continuous stone houses. Heavy iron-studded gates barred entry after sunset, while watchtowers rose from the centre of each settlement, allowing guards to signal nearby villages at the first sight of pirate sails. Streets were laid out as narrow, deliberately disorienting stone corridors beneath connecting archways, designed to trap invaders. Later, under Ottoman rule, the islanders retained substantial civic and religious privileges precisely because the sultan's court valued the resin for cosmetic, medical, and confectionery uses, designating the villages as imperial properties under the direct patronage of the Valide Sultan.

The Labour of the Kentima

The collection of mastic resin, protected by UNESCO as an element of intangible cultural heritage, remains an entirely manual discipline passed down through generations. Work begins in early summer with the preparation of the ground beneath the low branches. Cultivators clear weeds, level the earth, and sprinkle the surface with fine white calcium carbonate clay, known locally as asvestochoma. This clean, pale bed ensures that drops falling from the trunk do not blend with dark soil or pick up stubborn grit.

In July and August, farmers perform the kentima, or embroidery of the bark. Using small, curved iron grooving tools, they make shallow, diagonal incisions along the lower trunk and main limbs. The tree responds defensively to these minor wounds by exuding sap: clear, sticky drops that hang like teardrops from the bark before dripping onto the sweepings below. Farmers return every few weeks to harvest the hardened crystals, scraping the bark and collecting the droplets with small metal scrapers. The resin then undergoes weeks of meticulous washing, sieving, and hand-cleaning with paring knives, an intensive process traditionally carried out by village women through late autumn.

In the Pan and the Glass

In the Greek kitchen, mastic brings an unmistakable pine-cedar aroma with faint notes of citrus, incense, and mint. Because the raw crystals are brittle and resinous, grinding them requires care: crushing whole tears in a food processor turns the friction into a warm, sticky glue. Cooks grind the tears in a cold mortar with a small pinch of granulated sugar or sea salt to keep the powder fine and dry.

Mastic forms the aromatic backbone of festive holiday breads, most notably the braided New Year vasilopita and Easter tsoureki, where its herbal fragrance balances mahlab and orange zest. It is also stirred into dondurma-style ice cream, known in Greece as kaimaki, where it provides elasticity alongside ground orchid tuber (salepi). In southern Greek households, it flavours simple milk puddings and semolina halva. Outside the oven, distillers produce Mastiha of Chios, a clear liqueur obtained by distilling alcohol with mastic tears or macerating mastic oil into neutral spirits, served chilled after meals as an aromatic digestif.

Buying, Storing, and Identifying Pure Mastic

Authentic mastic carries European Protected Designation of Origin (PDO) certification, managed by the Chios Mastic Growers Association, a cooperative founded in 1938 to safeguard prices and quality. When buying whole tears, look for translucent, pale-yellow crystals with a matte powdery coating. Dark, deeply amber drops indicate aged or poorly stored resin, which loses top aromatic notes and hardens excessively.

Avoid pre-ground commercial powders unless their ingredient list confirms pure mastic; many cheaper jars cut the resin heavily with maltodextrin, starches, or synthetic flavourings. Store whole tears in an airtight glass jar in a dark, cool cupboard or in the refrigerator during warm summer months. If tears clump together in heat, chilling the jar quickly will restore their brittle state, making them easy to separate and crush for the kitchen.