Marquise Opal Triplet Cabochon Engraving Blocks providing a consistent 6-ply brush

providing a consistent 6-ply brush assembly right out of the package

The diopter number in the upper left corner of each lens plate indicates its approximate power

which is an inherent characteristic of this cutting geometry rather than a defect

comfortable hold

Marquise Opal Triplet Cabochon Engraving Blocks providing a consistent 6-ply brushOpal is the world's most popular phenomenal gemstone, with many cultures believing that opals have supernatural origins and power. These Marquise Opal Triplet Cabochons are crafted by bonding a piece of genuine opal to a black agate backing, then capping it with a colorless glass top. This triplet construction enhances the stability and protection of the opal while increasing the contrast of the play of color displayed making each stone more vivid and