Highly fluoresent yellow inclusions of hokkaidoite in opal that fluoresces pink and and purplish blue. Ex Hiromi Yamasaki Collection. Type Locality. Specimen measures 17mm. Photo under longwave UV.
Tiny sprays of goethite on an opal lining of a vesicle. Siderite crystals in another vesicle. Ex Joan Lamond Collection. Acquired by Joan in 2002 from Ann and Noel Kennon. Width of view 11.5mm. Stack...
Light purple cubes of fluorite do not fluoresce under longwave UV, but do fluoresce green under shortwave UV. Calcite is best seen under longwave UV as red patches. Balls of opal fluoresce pale green under...
There are two distinct species here based on the fluorescence response. Pale yellow fibrous sprays of weeksite that look like they fluoresce yellow, but are just reflecting the surrounding opal that fluoresce strongly. Width of...
Octahedral crystals of faujasite with opal spheres and coating. Exact species of faujasite not known. Ca, Mg and Na recorded (the latter two being Type Locality species). Width of view 5mm. Stack of 51 images....
Predominantly blue and green thin opal seams.
Hyalite opal, Jim Daly, Sauktown Sales, Indiana
Hyalite? Sulphates? ex Bernie and Margaret Day Collection
Hyalite? Sulphates? ex Bernie and Margaret Day Collection
Single terminated black crystal.
Prismatic and acicular topaz crystals, with opal coating tridymite, and also capping one of the topaz crystals, from the Conca Cannas quarry, Masullas, Mt. Arci, Oristano Province, Sardinia, Italy.
