Geographical Location
The origins of blue sapphires
The most notable sources of blue sapphires include; Sri Lanka, Australia, Thailand, Cambodia, Pakistan and the United States of America. Typically we would expect Australian blue sapphires to be darker in colour whilst those found in Montana (USA) are much brighter with an almost metallic lustre to them.
The classic and traditionally most popular Royal Blue colour is more often than not associated with Sri Lankan deposits., however Kashmir in Pakistan has also produced some of the most desirable gemstones of this colour. Royal Blue Kashmir sapphires are increasingly rare due to reduction in mining operations and depletion of deposits but these stones are hugely sought after, often fetching significant prices at auction, due to their rich velvety colour.
Corundum, the mineral behind the sapphires, is typically found in alluvial gem or placer deposits, having been weathered out over millions of years from their host rock. These gravel beds have been buried over time and can be reached without the need for large-scale machinery or intensive mining practices. Corundum can also be found in situ in its host rock of a pegmatite.
Our expedition film taken during our journey to Sri Lanka highlights some of the most sustainable practices in the mining of blue sapphires and other such gemstones.
Sri Lanka Expedition 2022