A type of fancy shape diamond, which is elongated with points at each end.
A term used primarily to describe small, round faceted diamonds of approximately .18 carat or less.
An item of jewellery which is ready to have the centre / main diamond or gemstone set into.
Mine cut diamond
An early form of the brilliant diamond with a squarish-shaped girdle, high crown, small table, deep pavilion, and very large culet.
Mohs Scale of Hardness
The 10-point scale of mineral hardness. On the Mohs scale of relative hardness, a diamond is rated as 10 meaning that it is the hardest mineral known to man. Only a mineral of the same hardness grade can scratch the mineral. Sapphires for example are graded as 9 on the Mohs scale of hardness which means that only another Sapphire or a diamond (because a diamond is harder) can scratch a Sapphire. Yet, Sapphires cannot scratch a diamond because they are softer.
Mohs 10-point scale of mineral hardness table.
|Hardness (from hard to soft)||Mineral|
|9||Corundum, Sapphire and Ruby|
|8||Emerald, Aquamarine, Topaz, Beryl and Hardened Steel|
|7||Quartz, Amethyst, Citrine and Agate|
|6.5||Tanzanite, Steel file, Iron Pyrite, Glass and Vitreous Pure Silica|
|6||Orthoclase, Titanium and Spectrolite|
|4.5||Platinum and Iron|
|3||Calcite and Copper Coin|
|2.5||Pure 24K Gold, Silver and Aluminium|