Asterism is usually a star like reflection effect a result of particular minerals in the host Corundum. They're microscopic acicular mineral inclusions of Exclusive orientation. If you love a splash of color but want excess brilliance, then our glowing yellow sapphire halo pendant necklaces are precisely what you require. Or https://medium.com/@thegemjournal/best-places-to-buy-sri-lankan-pukhraj-ea919f2bd00d