Unheated Sapphires from Misfit's Library

No Heat Treated Sapphires

Most of the mined sapphires undergo heat treatment, which is a standard process, and still be referred to as "natural."
Heating sapphires can intensify weak colors, improve uneven color distribution, and sometimes change the color entirely. It can also improve the clarity of a sapphire.

Unheated or "no heat" Sapphires are as they come out of the earth; the pristine form of the mineral is entirely natural and unaltered by humans, with just cut and polish added.
No-heat sapphires are sought after for their natural beauty, rarity, and the unique character they offer.