These are small - medium sized, medium grade Emerald tumbled stones from Brazil.
These Tumbles are priced per single stone.
The average size & weight of these stones are:
18mm x 16mm x 10mm & 6g
Emerald is a gemstone and a variety of the mineral beryl colored green by trace amounts of chromium and sometimes vanadium. Beryl has a hardness of 7.58 on the Mohs scale.
Emerald is the most precious stone in the beryl group. The name comes from the old French word 'esmeralde', which was derived from the Greek word 'smaragdos' meaning 'green stone'. The historical green color of emerald is unparalleled in the world of gemstones and it is considered as one of the most 'precious four' of all gemstones, which also includes sapphire, ruby and diamond. Although emeralds are one of the most valuable gemstones available today, most are very heavily included.