0.83ct Pear Shape Sapphire 6.9x4.9mm Gem-Clip Gemstone Holder

0.83ct Pear Shape Sapphire 6.9x4.9mm Gem-Clip Gemstone HolderSapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur. The variety in colours is due to trace amounts of elements such as iron, titanium, chromium, copper and magnesium. Mohs Scale of Hardness: 9 (out of 10). Sources: Mines that have yielded the finest sapphires in colour and clarity are located in Kashmir, Myanmar and Sri Lanka. Nowadays the main sources of sapphires are:

Widely Used: suitable for cutting timber

coloured gemstones

Bar mould width 4mm

18ct White Hard - 855-885°C

Honeycomb soldering blocks

Double-function model test: simple and continuous test

To measure temperature and humidity

Bergeon 6527-40-C

Closes certain case backs

Very classic design match for the high quality life

Can etch security codes firmly in metal

Delrin Height 20mm