Description
DALYITE SPECIMEN
This is the polished on the one side dalyite specimen with charoite. Dimensions: 4.5 x 1.4 x 0.2″ (11.5 x 3.5 x 0.6cm). Weight – 1.2oz (33 grams). Origin: Russia, Yakutia.
Some information about dalyite:
Dalyite is a rare accessory zirconium silicate. Compared to other zirconium silicates, it is the most saturated with silica and is characteristic of quartz-containing alkaline rocks.
Dalyite is usually colorless, sometimes brownish or slightly violet. It has a hardness of 7.5 and a white streak. Clear cleavage noted. It often forms aggregates of isometric crystals.
It first described in a block of alkali granite from Ascension Island (Van Tassel, 1952). Dalyite named after Reginald Aldworth Daly (1871-1957), an American petrologist who studied the geology of Ascension Island.
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