gemstone

Watermelon tourmaline in matrix

Elbaite tourmaline, Na(Li₁.₅Al₁.₅)Al₆Si₆O₁₈(BO₃)₃(OH)₃(OH)

AI-generated identification · may be incorrect

The visible pink-purple and pale green/cream material is consistent with zoned tourmaline in a light-colored matrix, though the image is not sufficient to confirm the identification. Tourmaline has Mohs hardness 7–7.5, vitreous luster, and a trigonal crystal structure; cleavage is poor.

Identified October 16, 2026More gemstone →

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Physical properties

Formation & geological history

Elbaite typically crystallizes in lithium-rich granitic pegmatites as magma cools and concentrates volatile elements. Such deposits occur in rocks of many ages; the specimen’s age cannot be determined from the image.

Uses & applications

Gem-quality material is cut for jewelry; attractive crystal-in-matrix pieces are collected and displayed.

Geological facts

Tourmaline crystals can show striking color zoning, including pink cores or bands alongside green outer zones.

Field identification & locations

Look for elongated, often striated crystals and strong color zoning; common sources include Brazil, Afghanistan, Madagascar, and the United States. The small specimen’s identity and matrix are uncertain without testing.