This remarkable specimen features a 10 x 7 x 6 cm twinned calcite still in situ in a gently curving concave vug of top-quality, gemmy apophyllite. The calcite is pristine and the apophyllite as well, except only its periphery along the plate's edges. The piece really "sparkles" in light, which reflects off the apophs and into the calcite, illuminating it from seemingly more angles than you would expect. A 3-diminsional twin of this caliber, on matrix so nicely balanced, is NOT at all common, and I get a piece of this style and quality only about once every 2-3 years