It was found in Tanzania, and it displays different hues depending ... The fire opal is rarer than other types of opal, especially in gem-quality stones. While the background of a fire opal ...

The two men are standing in the middle of the sun-bleached South Australian outback, hunting for opals, the rare gemstones that can sparkle with a rainbow of different colours. They sift through ...

Stony-iron meteorites consist of almost equal parts iron-nickel metal and silicate minerals including precious and semi-precious gemstones. They are considered some of the most beautiful meteorites.

Sharpening stones use several different types of abrasive grains. Examples include aluminum oxide, silicon carbide, super-abrasive diamond, and cubic boron nitride. Aluminum oxide, the most common ...

But these types of stone are quite different in almost every regard, including their origin, appearance, and utility. Crushed stone is a human-made aggregate that's produced by crushing big rocks ...

For the designer and gemologist Cora Sheibani, jewelry is much more than a status symbol, a decorative object or a talisman ...

The limited-edition silhouette, which is slated to launch at a random time on October 31, features holographic jelly overlays ...

In a fossil-rich pocket of northern New South Wales, two pioneering palaeontologists have spent decades digging up rare ...

The French high jewelry artist went to Paraiba tourmaline mines to work with miners and hand select his gems for a pair of one-of-a-kind earrings ...

NEW STONE AGE GIRL:That’s our dinner ... Farming. Cheap goats and different types of cattle have been introduced from over the sea. NARRATOR:People are no longer nomadic, now they are farmers ...