Silk in SapphireSome sapphires have drowsy transparency due to these tiny rutile needles. The term “needles” is frequently used to describe them since they frequently appear in groups and resemble stone striations. Asterism in star sapphires is also brought on by silk. Silk is not present in every sapphire. A sapphire addition that might truly increase its value is silk. It helps to spotlight a stone’s deeper facets and increase brightness when the highly reflecting rutile needles are present in modest concentrations within a cut sapphire.
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