from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A variety of transparent or translucent orthoclase.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A variety of orthoclase feldspar found as colorless to white prismatic crystals in cavities in metamorphic rocks. Some specimens reflect a bluish sheen along crystal faces. This phenomenon is called adularescence, and adularia with this property is called moonstone. (See sanidine).
from the GNU version of the Collaborative International Dictionary of English
- n. A transparent or translucent variety of common feldspar, or orthoclase, which often shows pearly opalescent reflections; -- called by lapidaries moonstone.
from The Century Dictionary and Cyclopedia
- n. A variety of the common potash feldspar orthoclase, occurring in highly lustrous transparent or translucent crystals. It often exhibits a delicate opalescent play of colors, and is then called moonstone (which see). Fine specimens are obtained from various localities in the Alps.
"Moon-stone," a variety of pearly adularia presenting chatoyant rays when simply polished.
Hasbrouck mineralization was deposited by an epithermal hot-spring system and is accompanied by pervasive silicification and oxidization, with associated adularia and pyrite.
Hasbrouck mineralization was deposited by an epithermal hot-spring system and is accompanied by pervasive silicification, with associated adularia and pyrite.
The first whole was lost in deep overburden however the second hole has intersected multiple banded quartz-adularia-rhodochrosite-sulphide veins which will be sampled and submitted for analytical analysis in accordance with National Instrument 43-101 procedures.
The veins are classified epithermal quartz-adularia-sericite type and consist fundamentally of quartz, chalcedonic quartz, minor chalcedony and local pseudomorf quartz after the calcite blade.
Pasco Canyon contains a low-sulfidation epithermal system defined at the surface by a 400 meter by 600 meter zone of boiling related breccias and quartz/adularia vein swarms.
Within the altered area are more intensely altered quartz-adularia zones hosting the old mine workings.
Similar high level alteration mapped 0.8 km to the northwest and adularia-sericite alteration mapped 1 km to the northeast suggests potential for other vein systems in the Moroshka basin.
Mineralisation is associated with an assemblage consisting of quartz, chalcedony, adularia, calcite, illite, sericite and trace sulphides.
Bladed quartz after calcite, adularia and colloform banded silica veins along the trend are indicative of boiling within the hydrothermal system creating conditions conducive to gold and silver mineralization.