This is a relatively large crystal for the species, from a rare and one-off find of this very rare species (circa 1976). You will almost never see a matrix example for sale, let alone one with such a large crystal! They are extremely uncommon today on the market, and ONLY come from this locality in good crystals of note. The crystal has an off-white color, and is translucent. It fluoresces blue under UV light. I purchased this in Seattle from associates of Jack Zektzer who collected the area with him and then hoarded these for several decades. Joe Budd photos