One of many opal mining sites in the red continent is called Yowah, and is famous for its opal nuts, veins of precious glowing opal within nodules of siliceous ironstone that often form amazing patterns. They vary from 0.5 to 20 cm across, and occur in an iron rich sandstone, near the border with an adjoining mudstone.
Thanks for asking me! I’ve recieved this question before so I decided to go ahead and publish my answer this time. I’ll list some favorites, including the localities and a link to some examples. In no particular order, my favs are:
- Rhodochrosite like these specimens from Romania or South Africa.I love the light pink blades from Romania and the stuff from South Africa looks like candy!
- Vanadinite from Morocco like thisor like this awesome specimen. The crystal formations are fascinating.
- Smithsonite from pretty much any location (examples). This stuff can come in just about any color and it sparkles.
- Fluorite from Germany, especially the Rainbow Fluorite. I also love Fluorite from Spain, China and Namibia. Yellow or golden fluorite is my favorite color but when I post it here it doesn’t get as many notes as purple fluorite, everyone seems to love that color best.