Hauyne

Hauyne forms part of lapis lazuli. It is inter-grown with other minerals and is seldom found as individual crystals. Hauyne has perfect cleavage that makes cutting it difficult. So, it is faceted primarily for collectors.

Occurrence

Hauyne is found as small and rounded grains in volcanic rocks. Ancient volcanoes of Germany and Morocco are the best-known sources.

Hauyne Properties

• Specific Gravity: 2.40
• Refractive Index: 1.50 (mean)
• Birefringence (DR): None
• Luster: Vitreous to greasy
• Crystal Structure: Cubic
• Composition: Complex silicate
• Hardness: 6

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