September – Sapphire ( also the stone for Virgos) gem jewelry facets
Black star sapphire
The Star of India is a 563.35 carat (112.67 g) star sapphire, one of the largest such gems in the world. (The It is almost flawless and unusual in that it has stars on both sides of the stone. The greyish blue gem was mined in Sri Lanka. The milky quality of the stone is caused by the traces of the mineral rutile,. The tiny fibers of the mineral, aligned in a three-fold pattern within the gem, reflect incoming light into the star pattern.