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 ...
Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. Jun 26, 2025, 02:26pm EDT Jun 27, 2025, 05:34am EDT A medieval ...
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 ...
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 ...
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 ...
Neelam, or blue sapphire, is a mineral corundum linked to Saturn in Vedic astrology, believed to clear obstacles and alter destiny. While scientifically unproven, wearing this rare and expensive gem ...
JOHANNESBURG (miningweekly.com) – The inaugural auction of rough ruby and corundum mined at Aim-listed Gemfields’ 75%-owned Montepuez deposit, in Mozambique, has raised $33.5-million, taking the ...
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