CHABAZITE, a mineral belonging to the large class of Alumina/e. It always occurs in the form of attached crystals ; never massive or fibrous. The primary form of the crystal is a rhomboid. The colour is white, also yellowish and red. The lustre is vitreous, and it is transparent to translucent. The hardness is 4 to 4-5. The specific gravity is to I It has the following composition :— Silica Alumina . 19.3 Lime . . ..... .
Potash . 2.5 Water This species includes Gmelinite, which occurs in small glassy crystals ; also Levyne, which is found in compound crystals ; and Ledererite, which has the form of Gmelinite, but differa in containing just one-third the quantity of water. Phacolite is another variety. It occurs in tho form of small glassy crystals, which are double six sided pyramids. AcaIiolitc appears to be another variety. It has a red colour, and comes from Nova Scotia. Berschelite is another
variety. It occurs in small hexagonal tables.
Chatathe is mostly easily distinguished by the nearly cubical form presented by its crystals. From Ana/rime it is distinguished by the intumescence produced by it under the blow-pipe. It is distin guished front Ca/c-Spar by its hardness and its action with acids ; from Fluor-Spar by its form and cleavage, and by tire absence of phosphorescence.
It is found in Trap, Gneiss, and Syenite. In the New World it is found in the Trap of Connecticut, in New Jersey, and New York. bedererite is found in Nova Scotia. aolmcite is found in the Faroe Islands, at the Giant's Causeway, Ireland, also in Iceland. Gmelinite is found in Antrim, Ireland. Leryne, at Glomrm in Ireland ; also iu Scotland, Iceland, and the Faroe Islands.