Sapphires like the “Black Star of Queensland”, “Star of Asia”, “Star of India”, and the largest of them all “Star of Adam” which weighs over 1400ct. Sapphire in particular, consisted of many largest and well-known star gemstones that existed. Perhaps asterism is more famously known for in corundums, ruby and sapphire. Rose quartz often produces prominent star, as for phenomenal garnets and dipoles exhibit 4-ray star. This phenomenon can be found in a variety of gemstones, such as quartz, moonstone, garnet, diopside, etc. We know a single band of light is referred to as chatoyancy or cat’s eye, whereas when few bands are visible and intersect each other for which it becomes a star.

Asterism usually displays a 6-ray star, but also can be found in 4-ray and rarely 12-ray stars in specific gemstones. Under the right circumstances, the gemstone will illuminate a star-like pattern just under the stone’s surface when interacted with light. The star in the gem is actually a special optical effect, known as asterism in gemmology, produced by phenomenal gemstones. Imagining a star on the palm of your hands

Black star of india gem