Debate over the future of opal mining in New South Wales has continued in recent weeks as the industry continues to reject proposed legislative changes.

Ethiopia has earned USD 16.4 million from the export of non-gold and non-ornamental minerals over the past six months, achieving 73% of its USD 22.4 million target, according to the Ministry of Mines.

Gemstones, including rubies, emeralds, and sapphires, can be sold for cash, much the same as diamonds and other jewelry.

This mineral tends to be bought by gem or mineral collectors ... This effect is called a “play of color.” It’s one of the rarer types of opal, especially in gem-quality stones. While its background is ...

The second part will explore charge-transfer phenomena and color centers as the cause of color in gems such as blue sapphire and Maxixe beryl. The series will conclude with colors that can be ...

Automatic Sapphire collection, showcasing stunning coloured sapphires, exemplifies technicity, innovative design and ...

Thursday January 16, 2025 - The new restrictions 'roughly triple the number of directly sanctioned Russian crude oil tankers, enough to affect around 900,000 barrels per day', analysts at Standard ...