| Total qty | Discount | Per unit | You save |
|---|---|---|---|
| 1 – 2 | — | — | |
| 3 – 4 | 5% off | ||
| 5 – 9 | 10% off | ||
| 10 + | 12% off |
Black Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye. Natural black chalcedony is exceedingly rare ā virtually all black chalcedony on the market is grey chalcedony that has been chemically treated to achieve its characteristic deep, shiny black color. Black Onyx has long been one of the top-selling chalcedony gemstones and was a hallmark material in Art Deco jewelry design. These antique flat top, single bevel cabochons offer a classic profile well suited for rings, pendants, and statement pieces requiring a bold, uniform black stone.
Care is straightforward: clean with warm, soapy water. Use of an ultrasonic or steam cleaner is generally considered safe for this material.
| Stone Type | Black Onyx (Dyed Black Chalcedony) |
|---|---|
| Profile | Antique Flat Top, Single Bevel |
| Treatment | Dyed |
| Color | Uniform Opaque Black |
| Composition | Microcrystalline Quartz (Chalcedony) |
| Care | Warm soapy water; ultrasonic and steam cleaning generally safe |
| Part # | Size | Notes |
|---|---|---|
| 947-132 | 12x10mm | ā |
| 947-133 | 14x12mm | Includes hole for diamond setting |
| 947-134 | 16x12mm | ā |
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