Blue spinel-baolong.com Baolong.com Colored Gemstone Knowledge—Blue Spinel Blue spinel is a kind of spinel family. Spinel telah menjadi permata berharga sejak zaman kuno. Because of its beauty and scarcity, it is also one of the most fascinating gems in the world and is often used in jewelry customization. Spinel has high hardness, few blemishes, [...]
