In the jewelry world, there are two kinds of colored gems that are often mentioned together, which are rubies and sapphires. Because these two kinds of gemstones belong to corundum with similar chemical composition and similar properties, we often call them “น้องสาวอัญมณี” และ “น้องสาวอัญมณี”. Many friends especially like rubies and sapphires. Baolong editor […]
