October Birthstone – Opal and Tourmaline
Scientific Make up – Composition Of The October Birthstone The Opal is a form of non-crystalline silica gel seeped into crevices of sedimentary strata. Through the passage of time and the heating as well as molding processes of nature, the gel has hardened to form Opal gemstones. The October birthstone is closely packed in spherical […]
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