Hyalite Opal
40003 RH Augite, Andesine, Hyalite Opal, Ilmenite, Colac Quarry, Ondit, Colac Otway Shire, Victoria
A fairly rough-looking white andesine crystal is perched on the end of a prismatic dark brown, almost black augite crystal. But wait there’s more. The top third of the augite crystal is coated by a thin blob of colourless hyalite opal. This hyalite also coats a number of small triangular...
40002 RH Hyalite Opal, Colac Quarry, Ondit, Colac Otway Shire, Victoria
Ex Dick Haslam Collection. Width of view 3.5mm. Stack of 60 images. Click on the image for a higher resolution one.
7395 JL1952 Hyalite Opal, Lake Rotokawa, Wairakei, Taupo District, Waikato Region, North Island, New Zealand
Acquired by Joan Lamond in 1995 from Judy Rowe.
7369 JL1705 Hyalite Opal, Trentham Falls, Trentham, Hepburn Shire, Victoria
Acquired by Joan Lamond in 1995 from Michael Hirst.
ncat WD113 Cassiterite, Hyalite, Erongo Mountains, Karibib, Erongo, Namibia
Nice sharp group of cassiterite crystals with a partial coating of fluorescent green hyalite opal. The hyalite fluoresces under longwave UV (Convoy) but is much brighter under shortwave. The green fluorescence is due to uranyl ions.
