Many minerals form beautiful crystals, but the most prized of all are gemstones. Uncut gems often look fairly ordinary–like rocks. It's only when they are cut and polished that they obtain the ...

Silent auctions added an extra layer of excitement, as attendees placed their bids on rare and unique pieces, hoping to take ...

There has been a slowdown in the mining sector, but KAZ Minerals does not seem to be suffering. The firm was among the lowest-cost copper producers globally in 2016. Gem Diamonds (LSE: GEMD ...