Silver wire: A specimen of wire silver with a heavy tarnish of acanthite on a calcite matrix. Specimen is approximately 6 x 4 x 3 centimeters in size. Specimen is approximately 6 x 4 x 3 centimeters in size.
Calcite Information. Found in veins, ore deposits, and as a constituent of rock limestone and marble. Crystals often large (many inches) and transparent. Limestone onyx is the material of most limestone caves, usually banded in shades of tan and brown. (Note: this is not the quartz -variety onyx).
For example, silver chloride dissolves readily in excess aqueous ammonia to form [Ag(NH3)2]+; silver salts are dissolved in photography due to the formation of the thiosulfate complex [Ag(S2O3)2]3−; and cyanide extraction for silver (and gold) works by the formation of the complex [Ag(CN)2]−.
Silver with Calcite, Acanthite. specimen number: 1135029. location: Kongsberg, Buskerud, Norway. description: Highly aesthetic curving wire of native silver about 0.4 cm at its thickest, this coming off matrix with crystals of colorless calcite. The wires are partly coated with tiny black sparkling acanthite crystals.
Mar 15, 2014 · The XRD spectrum showed that the hybrid materials is composed of crystalline calcite and silver nanoparticles. The TEM results indicated that the silver nanoparticles are discrete, uncapped and well stabilized in the surface of the eggshell derived calcium carbonate particles. The silver nanoparticles are spherical in shape and 5–20 nm in size.
Silver has many unique physical properties that give it very special status. Silver is the best conductor of electricity, is the second most malleable and ductile metal, and is in greater abundance than all other precious metals with similar properties. Due to its unique properties and intrinsic beauty, it is extensively used industrially and as ornaments.
Native Silver Native Silver & Calcite Kongsberg Ag Mining District, Kongsberg, Buskerud, Norway "A four inch cluster of heavy intertwined silver wires growing on calcite. Traded this specimen from the Theodore Rand collection at Bryn Mawr College near Philadelphia when Harold Arndt was still curator." - …