Nature's Treasure Chest
Amazing Dragons Vein Agate ~Green & Pink | Tophatter
American contraluz opal found in Opal Butte, Oregon ~ 4.6 x 4.4 x 1 cm ~ clear, transparent crystal body with a fiery gem-quality play of colour and a botryoidal jasper formation which forms a unique inclusion.
Incredible space stone seems like it has a nebula trapped inside
Depending on its orientation, iolite/cordierite can be perceived as near-colorless or bluish. The sample on the right, above, in fact tends toward brown when its orientation is altered. Gemmy material, like the faceted iolite below, as well as other minerals with useful optical qualities, could have aided Viking navigators. (Photo: Mia Dixon,
Prehnite 0n Tsavorite from Merelani Hills, Lelatema Mountains, Arusha Region, Tanzania [db_pics/pics/tu98c.jpg]