In some cases, black sapphires can be confused with deep blue sapphires, as some variants are extremely dark. In black sapphire, the higher presence of iron and titanium, which at moderate levels give rise to the conventional blue sapphires, gives them their darker hue.
In black sapphires, a considerable level of light is absorbed, rather than being reflected outward, hence its distinct colour. The visibility of colour depends on the type of colours in the light spectrum, and by extension the level of light, the gemstone is able to absorb with trace mineral character being the key determinant. With iron, titanium, magnesium and to a lesser extent chromium and vanadium dominating. Potential buyers are likely to be curious about how black sapphire gets their colour? Sapphires are hardened minerals that get their colour from the presence of trace elements. On the positive side, the dark hue of this particular sapphire stone help disguises such blemishes. Since black sapphire stones are known for their higher impurity levels, getting your hands on a black stone with fewer inclusions may prove to be challenging. However, when it comes to gemstone quality stones, acquiring black versions of these stones may prove to be challenging. Thus from a supply standpoint, the black sapphire's selling point is not their rarity. However, they differ in certain important ways.īlack sapphires are an interesting addition in that they are found in larger quantities, depending on what country you are looking at, with nations like Australia being a major source of these stones. Meaning they feature aluminium and oxygen atoms ((Al2O3). Black sapphires are natural corundum stones that have the exact chemistry of other more popular variants like blue sapphires. Not much is known about black sapphires, as they are not widely adopted in the world of gemstones and also in the market for fine jewellery. A newer addition to the family of corundum gemstones black sapphires are the darkest variant and hold a niche position.
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