Blue diamond is considered as the most expensive gemstone in the world. Priced at $3.9 million or P225 million per carat, it is a very pricey gemstone. While blue is one of the rarest diamond ...

The Second Rarest Gemstone In The World - In the vast world of gemstones, only a few manage to captivate the imagination of collectors as profoundly as ...

Still, the Hole rune stones are “a rare example of finding several fragments of a rune-stone” in “well-preserved, datable archaeological contexts” and provide “insight into early runic writing ...

Archaeologists in Norway have discovered fragments of the world’s oldest rune stone in Svingerud burial field, dating back to 50 BC–275 AD.

Piecing together fragments of the world's earliest known rune stone shows they fit together like a jigsaw puzzle and may have ...

Narrator: High-quality black opal can cost over $10,000 per carat, making it one of the world's most expensive gemstones ... is one of the most enchanting stones in the world, sought after ...