This amazing ring from the "Tetra" collection features a trillion Black Drusy Agate gem stone. The black colored stone is quite unique as tiny quartz crystals, called Drusy or Druzy, form within an agate, adding beauty and uniqueness. The ring fits a US size 7 but it can still be re-sized one size up (8 ). The stone is 14.4 mm by 14.3 mm. The sterling silver ring has a satin brushed finish and the bezel setting has a polished rim around the stone.
For any custom sizes I have a few other black drusy stones available that have a similar shape, some smaller, some wider or narrower etc. Everyone will yield a different unique ring.
A druzy (or, more commonly, drusy) is the term that refers to a blanket of tiny, sparkling crystals often found inside a geode or an agate. The sparkling appearance of druzy is like that of spilled salt or sugar. By far the most commonly found drusy is quartz (agate or chalcedony), but many other species can exist in this form : chrysocolla, uvarovite garnet, rainbow pyrite, rainbow hematite, psilomelane, cobalto-calcite, calcite, dolomite, sphalerite, melanite garnet, demantoid garnet, azurite, dioptase, siderite, vanadinite and turquoise.
The formation of the tiny crystals occurs after molten rock begins to quickly cool, trapping gasses within it as it solidifies. The trapped gasses cause crevices and cavities in the cooling rock. Nutrient-rich groundwater later flows through these gaps and crevices, depositing layer after layer of minerals which crystallize on top of each other. The resulting encrustation is called druzy (drusy, druse, druses). This process doesn't take days or weeks, but a few hundred or even a few thousand years. Naturally colored quartz drusy is found almost exclusively in muted colors such as white, grey, tan and cream. Many quartz pieces, though, are dyed black or other vivid colors such as purple, red, green and blue, and some are coated with titanium or other metallic vapor which creates various iridescent finishes.
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