 | | Journal (issue) | | Care! ARIZONA WULFENITE Down Deep in the Rowley Mine GEM GARNETS Popular for Centuries THE BALTIMORE...TRIP: www.rockngem.com Diamond Hill Quartz Winter Rockhounding in South Carolina RG_RED_cover_0914.indd...toxic. This 6 cm spray of needles is from the Herja mine (Baia Mare, Maramures), Romania. (Gerhard Brandstetter...common sense FIELD TRIP by Steve Voynick Diamond Hill Quartz ................................. 52 Underground...22 This Arizona mine is a specimen treasure trove Winter rockhounding in South Carolina by Wayne Peterson |  | | Book | | content, it is much less useful. For example pure quartz is colourless, but may be of almost any hue through...usually white and often too hard to powder easily. Quartz has a typical o·ystal form of six-sided prismatic...Adamantine highly reflective like diamond Vitreous glassy, as in quartz Resinous like resin, as in amber...minerals having no lustre 7 INTRODUCTION A diamond has few weaknesses and many strengths: it is the...Gypsum 7 Quartz 3 Calcite 8 Topaz 4 Fluorite 9 Corundum 5 Apatite 10 Diamond SPECIFIC GRAVITY | | | Book | | content, it is much less useful. For example pure quartz is colourless, but may be of almost any hue through...usually white and often too hard to powder easily. Quartz has a typical o·ystal form of six-sided prismatic...Adamantine highly reflective like diamond Vitreous glassy, as in quartz Resinous like resin, as in amber...minerals having no lustre 7 INTRODUCTION A diamond has few weaknesses and many strengths: it is the...Gypsum 7 Quartz 3 Calcite 8 Topaz 4 Fluorite 9 Corundum 5 Apatite 10 Diamond SPECIFIC GRAVITY |  | | Book (edition) | | SILICA III. l. AND SILICATES. SILICA. 253 Quartz Opal 259 2. SILICATES. General Remarks.- 262...MINERALOGY. 3. Minerals differ in hardness from the diamond at one end of the scale to soapstone at the other...other distorted crystals. Occasionally, as in the diamond, the planes of crystals are convex; and then, of...sometimes called a quartzoid, because it occurs in quartz. (3) Twelve-sided double pyramids. Two planes of...rhombohedrons. They are combined in Figs. 20, 21, forms of quartz. Ehombohedrons vary greatly in the length of the |  | | Book | | AFRICA widely in Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...region (Brunet, I 977b ). NEW YORK Amity, Orange County. At many isolated collected sites between the towns...Litchfield County. Ilmenite masses and crystals from somewhere near Washington, Litchfield County, were described |  | | Book (edition) | | point to a yard or more in diameA single crystal of quartz, now at Milan, is three and a quarter feet long...and seventy pounds. single cavity in a vein of quartz near the Tiefen Glacier, in Switzerland, discovered...discovered in a 1867, has afforded smoky quartz crystals weighing in the aggregate about 20,000 pounds considerable...the term crystal was applied only to crystals of quartz (f. I), which the ancient philosophers believed...hexakisociato its being a common form of crystals of diamond. hedron of Naumann. JB. Hemihedral Forms. the |  | | Book (edition) | | point to a yard or more in diameA single crystal of quartz, now at Milan, is three and a quarter feet long...of quartz near the Tiefen Glacier, in Switzerland, discovered in has afforded 1867, smoky quartz crystals...the term crystal was applied only to crystals of quartz (f. 1), which the ancient philosophers believed...called the being a common form of crystals of diamond. liedron of JSauinanh. to It is the its in...in the annexed figure (f. 155) of a crystal of quartz, in which there are only three planes, 2-2 at each |  | | Book (edition) | | ^ fe o -• vO y MINERALOGY AND MINING. Mine Accidents —Ventilation — Ore Dressing, Etc. DESCRIPTIVE...lific of valuable treats and advice." PRACTICAL MINE VENTILATION. WILSON. For the Use of Mining Engineers...above, there is also the department of Economic Mine) alogy, which is not here and (3) in the coarser...point to a yard or more in diameA single crystal of quartz, now at Milan, is three and a quarter feet long-...of quartz near the Tiefen Glacier, in Switzerland, discovered in 18fi7, has afforded smoky quartz crystals |
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Diamond Hill Quartz Mine, Antreville, Abbeville County, South Carolina, USA