Boulder Opal and Silver Sheen Obsidian Bracelet

Stretch bracelet made with 8mm Mexican Boulder Opal beads and 4mm Silver Sheen Obsidian spacer beads, hand-woven with black .7mm Stretch Magic cording (composed of a polyester and polyurethane mixture), bracelet is 7 inches around when relaxed and weighs 1.16 ounces
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Boulder Opal
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Scientific Composition: Highly hydrated silicone dioxide, non-crystalline mineraloid gemstone
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Spiritual Connotations: Serenity, self-expression, and spontaneity
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Silver Sheen Obsidian 
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Scientific Composition: Primarily silicone dioxide, remainder consists of variable amounts  aluminum, iron, potassium, sodium and calcium oxides, sheen effect is created by small inclusions of water vapor bubbles trapped inside, member of the glass group
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Spiritual Connotations: Healing, protection, and reflection