Boulder Opal. Dieter Rosenkranz has the most beautiful images of opals I have ever seen on the Internet. You should follow his page.
Iris (Iris) 'Pleasures of May' sibirica
Koroit Crystal Opal Nut [ one half ]
#Lithops beautiful 'stone' flowers
Stapelia hirsuta A low growing, spineless, succulent, mostly from South Africa.Most Stapelia flowers are hairy and have the odour of rotten flesh; Only exception is the sweetly-scented Stapelia flavopurpurea.