Amethyst market statistics

Amethyst

Color: violet, purple-violet
Hardness: 7
Refractive index: 1.54 - 1.55
Density: 2.65 - 2.66
Chemical composition: SiO2
Crystal structure: hexagonal
Lustre: vitreous
Origins: Widespread; main sources are Brazil, Uruguay, Bolivia, Argentina, USA, East Africa, Zambia, Namibia, Madagascar, India, Sri Lanka, Russia, Australia.

Amethyst is a transparent purple-violet variety of quartz. The best amethysts have a medium dark violet color and uniform coloring. They are rarely heated to lighten dark colors or to improve transparency. An amethyst will change color to yellow or greenish yellow after heat treatment. Long time exposure to direct sunlight may make the color fade.


Amethyst 39.00 cts. Published under permission: Miguel Angel Lopez	Amethyst 20.20 cts. Published under permission: Miguel Angel Lopez

Amethyst 26.54 cts. Published under permission: Miguel Angel Lopez	Amethyst Prasiolite 3.01 cts. Published under permission: Miguel Angel Lopez

The figures are based on Gemval's aggregated valuation statistics for the retail market. Irrelevant, controversial or repeat data are excluded from our analysis wherever possible. The figures are updated monthly.

Weight distribution for Amethyst

Occurrence is represented in % for different weight categories.

Price distribution for Amethyst

Occurrence is represented in % for different value intervals.

Clarity distribution for Amethyst

Occurrence is represented in % for different clarity grades.

Select gemstone variety:

Amethyst market prices