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Rock guide

Heliodor

gem · uncommon

Quick facts

Formula
Be3Al2Si6O18
Hardness
7.5–8
Luster
vitreous
Colors
yellow to greenish yellow

Heliodor is yellow beryl. Sulfur is earthy/resinous massive, not a crystal point.

Etched hexagonal prism, vitreous, beryl habit — not a massive sulfur lump.

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