Deep purple amethyst crystals on cream colored feldspar from Namibia.
Purple-tipped amethyst crystals on white blocky feldspar matrix from Namibia.
Close-up of deep purple zoned amethyst terminations from Namibia.
Macro of a single amethyst crystal tip with intense purple zoning.
Detailed view of secondary amethyst crystals on white matrix from Namibia.
Extreme macro of skeletal amethyst crystal faces showing structural growth lines.

Amethyst on Feldspar

Amethyst – SiO2
Elements: Silicon, Oxygen
Class: Silicates – Tectosilicates
Crystal System: Hexagonal
Hardness: 7
Quartz
Talc (1)Diamond (10)
Very hard. Scratches glass and steel.
Feldspar – KAlSi3O8
Elements: Potassium, Aluminum, Silicon, Oxygen
Class: Silicates – Tectosilicates
Crystal System: Monoclinic
Hardness: 6-6.5
Orthoclase
Talc (1)Diamond (10)
Scratches glass. Harder than a steel knife.
Size: 8.7 x 7.6 x 1.7 cm Origin: Goboboseb Mts, Brandberg Area, Dâures, Erongo Region – Namibia History: Ex Watzl Collection

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