Color-change Sapphire | Sri Lanka, gemstone, phenomenon, sapphire | Color- change sapphires are rare gems. Their basic color typically ranges from blue to violet. Under incandescent light, they can appear violetish purple...
![For Sale: 14.3 carat color-change Rwanda amethyst, 15x12.5mm, cut by guest Christopher Kirfman (u/dilbert1741). See comments for additional videos (including color-change from the rough) $700+shipping : r/Shinypreciousgems For Sale: 14.3 carat color-change Rwanda amethyst, 15x12.5mm, cut by guest Christopher Kirfman (u/dilbert1741). See comments for additional videos (including color-change from the rough) $700+shipping : r/Shinypreciousgems](https://external-preview.redd.it/pC5bDSAkCj1F-LdyB1pKGN4kd7B0K3MfIdDKtefr4xY.png?format=pjpg&auto=webp&s=30217c43091125bbfe66f1a7d78944933eb6c0f8)
For Sale: 14.3 carat color-change Rwanda amethyst, 15x12.5mm, cut by guest Christopher Kirfman (u/dilbert1741). See comments for additional videos (including color-change from the rough) $700+shipping : r/Shinypreciousgems
![ZHSG beautiful 1PC Natural Dream Amethyst Crystal Rough Purple Rockstone Mineral Specimen Unpolished Collection Gemstone Healing Home Decor (Color : 20-30g) : Amazon.co.uk: Health & Personal Care ZHSG beautiful 1PC Natural Dream Amethyst Crystal Rough Purple Rockstone Mineral Specimen Unpolished Collection Gemstone Healing Home Decor (Color : 20-30g) : Amazon.co.uk: Health & Personal Care](https://m.media-amazon.com/images/I/51YHLt1pAUL._AC_SX425_.jpg)
ZHSG beautiful 1PC Natural Dream Amethyst Crystal Rough Purple Rockstone Mineral Specimen Unpolished Collection Gemstone Healing Home Decor (Color : 20-30g) : Amazon.co.uk: Health & Personal Care
![Study on the effect of heat treatment on amethyst color and the cause of coloration | Scientific Reports Study on the effect of heat treatment on amethyst color and the cause of coloration | Scientific Reports](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41598-020-71786-1/MediaObjects/41598_2020_71786_Fig1_HTML.jpg)