Willemite with Rosasite - image 1
Willemite with Rosasite - image 2
specimen video

Willemite with Rosasite

$1,500.00

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Crystal Classics
Crystal ClassicsFeatured
Tucson, Arizona, USA
7,543 for sale·132 sold
This showy and magnificent cabinet specimen displays masses of tiny, dark bluish green Willemite crystals, widely distributed over an rusty, orange tan ferruginous matrix with a generous scattering of bluish green Rosasite micro-crystals. From the now closed and flooded Tsumeb mine in the Oshikoto Region of Namibia, this is a spectacular example of the zinc silicate Willemite in association with Rosasite, a copper zinc carbonate hydroxide. At Tsumeb, Willemite could occur in spectrum of colours from dark to light blue, numerous shades of green and even through to bright yellow! This example is one of its darker manifestations.

Product details

Species
Willemite, RosasiteAbout Willemite →
SizeCabinet
Dimensions11.3 x 8.5 x 4.6 cm
Listed on12/02/2024
Locality
Namibia, Oshikoto Region, TsumebRegional guide →
SKUCC35066

Learn more

Willemite
Mineral guide
Learn about Willemite
fluorescent zinc silicate with UV glow; daylight colors range from colorless to pistachio, iconic from Franklin–Sterling Hill and Tsumeb.
Willemite
Regional guide
Willemite from Tsumeb, Namibia
Tsumeb willemite is the zinc silicate for collectors who usually think of willemite as a fluorescent-mineral classic from Franklin, New Jersey, and then discover that Tsumeb rewrote the aesthetic rules. Here, Zn2SiO4 appears not as massive ore but as glassy to sparkling crystal groups, botryoidal crusts, radiating sprays, delicate acicular “lawns,” and rare individual hexagonal prisms. The colors are equally un-Franklin-like: white, gray, yellow, green, blue-green, turquoise-blue, pale blue, reddish brown, and the much-loved champagne to honey tones. The best pieces have a crisp, jewel-like presence in daylight, often on white calcite or dolomite, with the color contrast that Tsumeb collectors prize.