Tumble Polished > Quartz Tumbled Aventurines Tumbled Polished Cabs Rough Think red purple Aventurine Quartz , which can sort of look like lower grade Lepidolite but has more of a reddish tone , tumble polished rough gem stone tumbling wire wrapping freeforms Raw uncut lapidary cabs jewelry grade pebble sized chunk Aventurines Tumbled Polished Cabs Rough http://facetroughgemstones.com/gem-store/product_info.php/products_id/4058