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OBSIDIAN

Obsidian is an igneous rock that forms when molten rock cools very rapidly. The result is a rock that cooled so fast, crystals did not get a chance to form.  Obsidian is a naturally occurring volcanic glass with a smooth and uniform structure.  Obsidian is extremely rich in silica (about 65 to 80 percent), is low in water, and has a chemical composition similar to rhyolite.  Obsidian has a glassy lustre and is slightly harder than window glass.

It can be gray to black and often displays splotchy white patches or “snowflakes”. Obsidian can also be brown to orange or red and have bands or a sheen. Iridescent obsidian is known as rainbow obsidian. Small translucent rounded pieces are called Apache tears. Obsidian gets its name from a Obsius who is said to have discovered it in Ethiopia. Obsidian has been known and used since antiquity.
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  • Antique & Vintage
    • Shop By Era
    • Engagement Rings
    • Cocktail Rings
    • Timepieces
    • Gentlemans Accessories
    • Bracelets
    • Earrings
    • Necklaces & Pendants
    • Diamonds
    • From The Vault
    • For The Trade
    • The Archives: A Collection of Sold Items
  • Custom
    • Custom Jewelry
    • Custom Engagement Rings
    • Recreating an Heirloom
    • Family Crest Jewelry
    • Design Process
    • Schedule Consultation
  • Sell To Us
  • Services
    • Appraisal Services >
      • Appraisals
      • SELL TO US
      • Museum Collection Services
    • Schedule Consultation
    • Design Custom Jewelry
    • Recreating an Heirloom
    • Jewelry Repair
    • Timepiece Repair
    • Diamond Cutting and Gemstone Repair
    • Find Jewelry For Me
    • Find a Watch For Me
    • Insurance Replacement
    • Host a Trunk Show
    • Layaway Plan
    • Private Collection Management
  • The Brand
    • Our History >
      • Sustainability
      • Military and First Responder Discounts
      • Kimberly Process
    • Our Experts
    • Press
    • Be Social
    • Gems by VBS The BLOG
    • Reviews
    • Advice >
      • The Courtship
      • The Wedding
    • Education >
      • Educational Session
      • Antique & Vintage Education >
        • Ancient
        • Medieval & Renaissance
        • Baroque & Rococo
        • Georgian
        • Victorian
        • Edwardian
        • Art Nouveau
        • Arts & Crafts
        • Art Deco
        • Retro
        • Hollywood Glam
        • Mid-Century Modern
        • Brutalist
        • Art Organique
        • Contemporary
        • Simplistic
      • Diamond Education >
        • Diamond Carat Weight by MM
        • Comparative Round Size Info
      • Gemstone Education >
        • Diamond Laboratories
        • All About Gemstones
        • Approximate Gemstone weights
        • Carat to MM Conversion
        • Gemstone Colors
        • Created, Synthetic & Simulated Gemstones
        • Equivalents Chart
      • Engagement Rings
      • Diamond Earrings
      • Timepieces >
        • Vintage Rolex
        • Watch Terms
      • Ring Designs & Sizings >
        • Ring Width
        • Ring Size
      • Custom Jewelry
      • Metals
      • Engraving
      • Birthstones
      • Jewelry Care
      • Jewelry Terms
      • French Terms
  • Contact