datolite


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datolite

[′dad·əl‚īt]
(mineralogy)
CaBSiO4(OH) A mineral nesosilicate crystallizing in the monoclinic system; luster is vitreous, and crystals are colorless or white with a greenish tinge.
References in periodicals archive ?
Calcite first appears near the bottom of zone 4 as crystals on quartz and datolite and as fillings of quartz-lined vugs.
Datolite and prehnite are still present; however, albite and calcite become more common, as do the zeolites heulandite and stilbite.
In the higher-temperature environment quartz deposition declined markedly as other elements, mainly calcium, aluminum and boron, united with silica to form prehnite, datolite and other silicates.
As the crystallization of prehnite and datolite began to wane, anhydrite began to dissolve.
The major ore minerals are datolite and danburite with the later datolite at least partially derived from alteration of the earlier danburite.
Datolite mineralization completely replaces the limestone matrix in the central portions of the deposit with well-formed crystals occurring both in pockets and in large open fissures.
Each was analyzed by X-ray diffraction and microprobe and found to be a mixture of fluorite and datolite.
This quarry is best known for its outstanding datolite and (rarely) babingtonite specimens, but these new white, translucent scalenohedrons and compound scalenohedrons of calcite, reaching 10 cm, are no poor sisters either.
8-cm anatase crystal and a 10-cm plate of gemmy yellow datolite along with a matching faceted datolite stone.
For the mineral collector there was plenty more to choose from, including fine green datolite from Charcas, Mexico.
At Wessels mine, ruizite is found with quartz, datolite, pectolite, otientite, inesite and apophyllite (Wilson and Dunn, 1978).
The presence of the boron-bearing mineral datolite, reported from Gambatesa by some collectors, has not been confirmed.