Euclase Crystal — Cabinet Specimen

$2,112.92
Chemical FormulaBeAlSiO₄(OH)
Crystal SystemMonoclinic
Mohs Hardness7.5
Specific Gravity3.10
LusterVitreous
TransparencyTransparent

Euclase — named for its perfect cleavage (Greek: ‘eu’ + ‘klasis’) — is a beryllium-aluminum silicate of extraordinary rarity. Colombian material from emerald-producing regions show…

Only 3 available — a rare find.

SKU: TC-MIN-0229
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Description

Consider what had to happen for this specimen to exist. Euclase — named for its perfect cleavage (Greek: ‘eu’ + ‘klasis’) — is a beryllium-aluminum silicate of extraordinary rarity. Colombian material from emerald-producing regions shows pale blue to blue-green color. Because of its perfect cleavage it rarely survives gemcutting intact, making crystals more valuable than faceted stones.

This specimen originates from Gachala, Cundinamarca, Colombia, one of the world’s most significant localities for this type of material. Collectors and scientists have drawn from this region for generations, and for good reason: the combination of geological conditions here produces specimens of exceptional quality and clarity.

Every specimen is unique. Photographs approximate the visual experience, but the real thing — its weight, its luster under a raking light, the way it catches the corner of your eye — can only be experienced directly.

Formation

This specimen formed through geological processes operating over timescales that dwarf human history. The specific combination of chemistry, temperature, pressure, and time at this locality produced material of exceptional quality that makes it a valued addition to any serious collection.

Locality

Euclase Crystal — Cabinet Specimen from Gachala, Cundinamarca, Colombia. This locality is known for producing specimens of exceptional quality.

Collector Notes

The luster is maximized by low-angle raking light — try a single spotlight.