Color & Tint
Totally colorless, without any secondary tint (orange, green or indigo) is the most desirable color of White Sapphire. These are the purest form of Sapphires because they lack any trace element that imparts color to Corundum; making them rare and precious.
Like the Yellow variant, White Sapphires are often heated to a) hide natural inclusions; and b) make them more appealing to look at. While acceptable as a jewellery, these are not suitable as an astro-remedy.
In a strange play of economics, higher demand for Yellow Sapphires has actually increased prices of untreated White Sapphires. Several manufacturers delve in the unscrupulous practice to artificially treat White Sapphires with heat, irradiation, dyes etc. to convert them into yellow variants. As a result, sourcing completely untreated, natural White Sapphires have become difficult, leading to higher prices.