ncat OW101 Cassiterite, Mount Alwa Tin Mine, Walwa, Towong Shire, Victoria
Cassiterite in greisen. Collected in 1971. Specimen measures 80x55x35mm.
Cassiterite in greisen. Collected in 1971. Specimen measures 80x55x35mm.
Lustrous cassiterite crystals and luinaite on and in quartz. Tiny rosettes of tan siderite on the cassiterite. Ex Mark Hallam Collection. Width of view 11.5mm. Stack of 110 images. Click on the image below for a higher resolution version.
A cluster of yellow-green apatite crystals with the largest 31mm wide, with minor cassiterite and arsenopyrite. The apatite exhibits orange zoned fluorescence. Ex Barry Porter Collection. Ex Mike and Coralie Fisher Collection. Click on the images below for a higher resolution version.
A single crystal of cassiterite with no matrix. 13x13x7mm. Stack of 25 images. Click on the image below for a higher resolution version.
A sample of alluvial heavy concentrate in a vial from the Ringarooma River, Derby, containing mostly brown to black cassiterite, with minor orange zircons, and occasional sapphires and black spinel. Width of view 14.25mm. Stack of 45 images. Click on the image below for a higher resolution version.
A tiny cassiterite crystal embedded in matrix. Width of view 4.75mm. Stack of 20 images. Click on the image below for a higher resolution version.
Sharp crystals of cassiterite ranging in colour from yellow through grey and brown to black, some zoned, with white topaz (to the right and slightly below the main cassiterite crystal) and green torbernite (not in photo). Width of view 9.5mm. Stack of 55 images. Click on the image below for...
Brown to black euhedral cassiterite crystals with zoned divergent sprays of prismatic crystals in the matrix. Width of view 16mm. Stack of 75 images. Click on the image below for a higher resolution version.
Dark brown cassiterite crystals and an iron-stained topaz crystal (centre top) embedded in a corroded greisen matrix. Width of view 9.5mm. Stack of 40 images. Click on the image below for a higher resolution version.
Three loose complex crystals without any matrix. Collected underground. Width of view 19mm. Stack of 34 images. Click on the image below for a higher resolution version.
A twinned cassiterite crystal with a small smoky quartz crystal at the centre, no matrix. A gift from, and collected by, the late Albert Chapman. Width of view 14mm. Stack of 66 images. Click on the image below for a higher resolution version.
Lustrous black cassiterite crystals with chlorite-coated quartz and dark olive-green prismatic actinolite. Width of view 19mm. Stack of 85 images. (Top image). Click on the image below for a higher resolution version.