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  • Amethyst

Amethyst

A variety of Quartz

A violet to purple variety of quartz that owes its color to gamma irradiation (Berthelot, 1906) and the presence of traces of iron built into its crystal lattice (Holden, 1925). The irradiation causes the iron Fe(+3) atoms that replace Si in the lattice to lose an electron and form a [FeO4]0 color center (Lehmann and Moore, 1966).
The color in amethyst from most localities is unevenly distributed in the individual crystals. In amethyst geodes it is often most intense in the growth zones under the rhombohedral faces (at the tips). Occasionally the color is deeper under either the r or z rhombohedral faces, giving the crystal a pinwheel appearence when viewed from the top. In prismatic crystals the color may appear in phantom-like thin layers, while in scepters and skeleton quartz the color is often concentrated along the edges, and accompanied by smoky zones. Despite the intense color, the content of iron occupying Si positions in amethyst is rather low, in the 10-100 ppm range (Dennen and Puckett, 1972).

Name

From Greek "a-methystos", meaning not drunk.

Physical Properties

Lustre: Vitreous
Colour: Violet – purple. Pleachroic: Blue – violet to purple

Chemical Properties

Formula: SiO2
Elements listed: O, Si

Synonyms

Amethystine agate, Amethystine quartz, Bishops Stone and Lavendine

Varieties

Burnt amethyst, and Hair Amethyst

Natural Tangerine Amethyst Quartz Clusters x 2 From Mumbwe, Zambia

Natural Tangerine Amethyst Quartz Clusters x 2 From Mumbwe, Zambia

R 821.00 ZAR
Natural Tangerine Amethyst Quartz Cluster x 1 From Mumbwe, Zambia

Natural Tangerine Amethyst Quartz Cluster x 1 From Mumbwe, Zambia

R 793.00 ZAR
Natural Zambian Amethyst Quartz Clusters x 2 From Mumbwe, Zambia

Natural Zambian Amethyst Quartz Clusters x 2 From Mumbwe, Zambia

R 706.00 ZAR
Natural Zambian Amethyst Crystal Cluster x 1 From Mumbwe, Zambia

Natural Zambian Amethyst Crystal Cluster x 1 From Mumbwe, Zambia

R 894.00 ZAR
Natural Zambian Amethyst Quartz Clusters x 2 From Mumbwe, Zambia

Natural Zambian Amethyst Quartz Clusters x 2 From Mumbwe, Zambia

R 909.00 ZAR
Natural Zambian Amethyst Crystal Clusters x 2 From Mumbwe, Zambia

Natural Zambian Amethyst Crystal Clusters x 2 From Mumbwe, Zambia

R 483.00 ZAR
Natural Spirit Amethyst Quartz Clusters x 2 Kg Lot  From Boekenhouthoek, South Africa

Natural Spirit Amethyst Quartz Clusters x 2 Kg Lot From Boekenhouthoek, South Africa

R 1,212.00 ZAR
Natural Zambian Amethyst Crystal Clusters x 5 From Mumbwe, Zambia

Natural Zambian Amethyst Crystal Clusters x 5 From Mumbwe, Zambia

R 693.00 ZAR
Natural Zambian Amethyst Crystal Clusters x 2 From Mumbwe, Zambia

Natural Zambian Amethyst Crystal Clusters x 2 From Mumbwe, Zambia

R 706.00 ZAR
Natural Zambian Dark Amethyst Clusters x 4 From Mapatizya, Zambia

Natural Zambian Dark Amethyst Clusters x 4 From Mapatizya, Zambia

R 524.00 ZAR
Natural Classic Affordable Brandberg Amethyst Crystal Specimens  x 12 From Tafelkop, Brandberg

Natural Classic Affordable Brandberg Amethyst Crystal Specimens x 12 From Tafelkop, Brandberg

R 626.00 ZAR
Natural Small Haematoid Zambian Amethyst Crystal Clusters x 2 From Mumbwe, Zambia

Natural Small Haematoid Zambian Amethyst Crystal Clusters x 2 From Mumbwe, Zambia

R 464.00 ZAR
Natural Cleaned Stunning Zambian Amethyst Quartz Cluster x 1 From Mumbwe, Zambia

Natural Cleaned Stunning Zambian Amethyst Quartz Cluster x 1 From Mumbwe, Zambia

R 478.00 ZAR
Natural Skeletal Sceptre & Window Smokey Amethyst Crystals  x 24 From Chiredzi, Zimbabwe

Natural Skeletal Sceptre & Window Smokey Amethyst Crystals x 24 From Chiredzi, Zimbabwe

R 1,114.00 ZAR
Natural Hematoid Amethyst Quartz Cluster x 1 From Mumbwe, Zambia

Natural Hematoid Amethyst Quartz Cluster x 1 From Mumbwe, Zambia

R 800.00 ZAR
Polished Window Smokey Amethyst Crystal Points x 12 From Akansobe, Madagascar

Polished Window Smokey Amethyst Crystal Points x 12 From Akansobe, Madagascar

R 807.00 ZAR
Natural Spirit Amethyst Quartz Crystals x 17 From Boekenhouthoek, South Africa

Natural Spirit Amethyst Quartz Crystals x 17 From Boekenhouthoek, South Africa

R 728.00 ZAR
Polished Chevron Amethyst Standing Free Form x 1 From Madagascar

Polished Chevron Amethyst Standing Free Form x 1 From Madagascar

R 1,670.00 ZAR
Natural Spirit Amethyst Quartz Clusters x 12 From Boekenhouthoek, South Africa

Natural Spirit Amethyst Quartz Clusters x 12 From Boekenhouthoek, South Africa

R 464.00 ZAR
Polished Chevron Amethyst Crystal Points x 6 From Zambia

Polished Chevron Amethyst Crystal Points x 6 From Zambia

R 572.00 ZAR
Natural Zambian Amethyst Cluster x 1 From Mumbwe, Zambia

Natural Zambian Amethyst Cluster x 1 From Mumbwe, Zambia

R 696.00 ZAR
Natural Zambian Amethyst Crystal Clusters x 2 From Mumbwe, Zambia

Natural Zambian Amethyst Crystal Clusters x 2 From Mumbwe, Zambia

R 464.00 ZAR
Natural Zambian Dark Amethyst Cluster x 1 From Mumbwe, Zambia

Natural Zambian Dark Amethyst Cluster x 1 From Mumbwe, Zambia

R 394.00 ZAR
Natural Spirit Amethyst Quartz Clusters x 2 From Boekenhouthoek, South Africa

Natural Spirit Amethyst Quartz Clusters x 2 From Boekenhouthoek, South Africa

R 896.00 ZAR
Natural Amethyst Crystal Specimens x 5 From Chiredzi, Zimbabwe

Natural Amethyst Crystal Specimens x 5 From Chiredzi, Zimbabwe

R 708.00 ZAR
Natural Window Smokey Amethyst Specimens x 16 From Brandberg , Namibia

Natural Window Smokey Amethyst Specimens x 16 From Brandberg , Namibia

R 974.00 ZAR
Natural Rare Hematoid Amethyst Clusters x 2 From Mumbwe, Zambia

Natural Rare Hematoid Amethyst Clusters x 2 From Mumbwe, Zambia

R 452.00 ZAR
Natural Hematoid Amethyst Quartz Cluster x 1 From Mumbwe, Zambia

Natural Hematoid Amethyst Quartz Cluster x 1 From Mumbwe, Zambia

R 1,036.00 ZAR
Natural Hematoid Amethyst Quartz Cluster x 1 From Mumbwe, Zambia

Natural Hematoid Amethyst Quartz Cluster x 1 From Mumbwe, Zambia

R 675.00 ZAR
Natural Chiredzi Amethyst Crystals x 20 From Chiredzi, Zimbabwe

Natural Chiredzi Amethyst Crystals x 20 From Chiredzi, Zimbabwe

R 348.00 ZAR
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