Ruby is a pinkish -red to blood-red gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable.

1 day ago · Ruby is one variety of the corundum mineral species, which also includes sapphire. Ruby is highly regarded and can command high per-carat prices. It is arguably one of the most …

Rubies (and the other corundum variety, sapphire) are an oxide written as Al₂O₃, formally called aluminum oxide. This chemical composition is the foundation of what makes rubies so unique.

Corundum is used as a gemstone, abrasive, refractory and much more. Red corundum is a ruby, blue is a sapphire, any other color is a fancy sapphire. Synthetic corundum is used instead of …

Apr 24, 2023 · Ruby is a very hard and durable gemstone, with a hardness of 9 on the Mohs scale, and is often used in jewelry such as rings, necklaces, and bracelets. Ruby is also known …

Ruby is the red variety of the mineral Corundum. Sapphire, the other gem variety of Corundum, encompasses all colors of Corundum aside from red. In essence, Ruby is a red Sapphire, …

Ruby, gemstone composed of transparent red corundum (q.v.), a mineral form of aluminum oxide, Al2O3. Its colour varies from deep cochineal to pale rose red, in some cases with a tinge of …

Ruby is made up of the mineral corundum, which is aluminum oxide (alumina, Al 2 O 3). It becomes the precious stone when it has a a small impurity of chromic oxide which gives it the …

In traditional gemmological terms, ruby has to be blood-red and of clear, facetable quality to justify the name. However, in wider usage, any corundum with a red or reddish colour has attracted …

Defined as a variety of the mineral corundum, ruby gets its rich color primarily from the presence of chromium. This mineral is not only prized for its beauty but also for its remarkable hardness, …