Most amber found today was formed during the Tertiary Age, about 30-50 million years ago, after the dinosaurs were extinct. In a few places such as Lebanon, New Jersey (USA) and Alava (Spain), amber from the age of the dinosaurs (65-220 million years ago) has been found, but in v...
800 known mineral s are considered gemstones. About 20 of these 70 gems are commonly found. All gemstones have one thing in common - beauty. Beauty, however, is a rather intangible thing. The perception of beauty varies from person to person, and from culture to culture. Beauty in a ...