Prasiolite Teardrops: Prasiolite is a naturally occurring Green Quartz, quite rare, its only commercial source a small mine in Brazil. Most Prasiolite on the market these days is heat-treated Amethyst Quartz, but the heat-treated Amethyst material is darkish in colour, where the naturally occurring Prasiolite from this small Brazilian mine presents as a very light and translucent green, which is how this pair above, of multi-facetted plump teardrops, presents.