This is a magnificent Mexican creedit not just for sheer size (almost unprecedented on the market today) but also for quality and crystal size. These crystals are lustrous, gemmy, and have a deep lavender hue (more pronounced in person if anything). They exceed 2 cm in size in some parts of the specimen. As importantly, the glassy luster is just astonishing and in the top percentile for the material. A piece such as this would have been uncommon even in the early 1980's when they were coming out through John Whitmire, and you can see it was exceptional from the fact that it was purchased for the collection of Perkin and Ann Sams of Houston (the donor who gave the Houston Museum of Natural History its big leap info mineral fame).