A Sri Lankan gem company claims it has discovered the world's largest single natural blue sapphire, a 683-pound gemstone that it plans to auction after obtaining an official valuation. A 310 kilograms ...

Sapphire is a corundum gemstone that has meaning, properties, and uses. Corundum gemstones are the crystalline form of aluminum oxide with traces of iron, titanium, vanadium, and chromium. Sapphire is ...

Neelam, or blue sapphire, is a mineral corundum linked to Saturn in Vedic astrology, believed to clear obstacles and alter ...

Wait a minute, corundum is just a mineral, right? Yes, and being relatively common mineral found in all kinds of rocks (igneous, metamorphic and sedimentary) and very hard and nicely colored, it has ...

Douglas, Isle of Man, Jan. 24, 2023 (GLOBE NEWSWIRE) -- Synthetic sapphire, also known as Corundum, is a manufactured gemstone. It has the same chemical composition as a natural sapphire. Synthetic ...

The hardness scale was created by trying to scratch one mineral with another. It was then recorded which mineral left a scratch. For example, Corundum, (Ruby and Sapphire) was used to scratch Apatite.

DUBLIN--(BUSINESS WIRE)--The "Global Corundum Market - Segmented by Variety, End-User Industry and Geography - Trends and Forecasts 2017 - 2022" report has been added to Research and Markets' offering ...