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Sieber agate is not a true agate but rather a glassy
Its needle to like inclusions of hematite are iridescent red
Each piece is unique and stunning
iron or manganese impurities within the stone
The holes in these beads are straight
Ruby (Heated) 3mm Faceted Round - 15-16 Inch Size_2x4-3x5mm Sieber agate is not aRuby is a precious gemstone known for its deep red color. It is a variety of the mineral corundum, the second hardest mineral next to diamond . The presence of chromium is what gives a ruby its red color. Trace amounts of iron can also affect the hue, giving some rubies a slightly brownish or purplish tint. Ruby has long been considered one of the most beautiful and valuable gemstones on the planet. At times in ancient history, Ruby was valued more
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