RARE SPECIMENS OF HIGH GRADE SILVER GOLD ORE FROM A COMSTOCK LODE MINE CIRCA 1869.
COLLECTABLE ORE SAMPLES DISCOVERED IN THE COMSTOCK NEAR VIRGINIA CITY, NEVADA BY LOCAL ROCK COLLECTOR.
cat# CSTK0062..US$ 895
cat# CSTK0350..US$ 439
cat# CSTK1050..US$ 229
EMAIL CAT# & CONTACT INFO TO
— ComstockOre@Gmail.com —
MINERAL COLLECTOR WILL CONTACT YOU FOR SHIPPING & PAYMENT ARRANGEMENTS.
WIKIPEDIA EXCERPTS – COMSTOCK LODE MINERALS
the mineral cubic silver sulfide (Ag2S) with a blackish lead-grey color and metallic lustre.
The mineral is perfectly sectile and has a shining streak.
It occurs in mineral veins, and when found in large masses, as in is Mexico & in the Comstock Lode in Nevada, an important ore of silver.
(from the Lat. argentum, silver)
Electrum is a naturally occurring alloy of gold &silver, with trace amounts of copper and other metals. Its color ranges from pale to bright yellow, depending on the proportions of gold and silver.
Electrum consists primarily of gold and silver, electrum is a good conductor of electricity.
The color of electrum is pale yellow or yellowish-white and the name is a Latinized form of the Greek word (elektron) mentioned in the Odyssey meaning a metallic substance consisting of gold alloyed with silver. The same word was also used for the substance amber, probably because of the pale yellow color of certain varieties, and it is from the electrostatic properties of amber that the modern English words “electron” and “electricity” derive. Electrum was often referred to as white gold in ancient times but could be more accurately described as “pale gold”. The modern use of the term white gold usually concerns gold alloyed with any one or a combination of nickel, silver, platinum and palladium to produce a silver-colored gold.
Electrum was much better for coinage than gold, mostly because it was harder and more durable.
Stephanite is a silver antimony sulfide mineral with formula: Ag5SbS4 It is composed of 68.8% silver, and sometimes is of importance as an ore of this metal.
Under the name Schwarzerz ..”black silver ore” (German Schwarzgultigerz).
crystals. they have the form of six-sided prisms or flat tables terminated by large basal planes and often modified at the edges by numerous pyramid-planes. The colour is iron-black, and the lustre metallic and brilliant.
Stephanite occurs with other ores of silver in metalliferous veins. In the Comstock lode in Nevada massive stephanite and argentite are important ores of silver.
Silver is a chemical element with the chemical symbol Ag (Latin: argentum, from the Ancient Greek: argeentos, gen. of – argeeis, “white, shining” ) and atomic number 47. A soft, white, lustrous transition metal, it has the highest electrical conductivity of any element and the highest thermal conductivity of any metal. The metal occurs naturally in its pure, free form (native silver), as an alloy with gold (electrum) and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a by-product of copper, gold, lead, and zinc refining.
An ore is a type of rock that contains minerals such as gemstones or metals that can be extracted through mining and refined for use. Samples of ore in the form of exceptionally beautiful crystals, exotic layering visible when sectioned or polished or metallic presentations such as large nuggets or crystalline formations of metals such as gold or copper may command a value far beyond their value as mere ore or raw metal for subsequent reduction to utilitarian purposes.
The grade or concentration of an ore mineral, or metal, as well as its form of occurrence, will directly affect the costs associated with mining the ore. The cost of extraction must thus be weighted against the contained metal value of the rock to determine what ore can be profitably extracted and what ore is of too low a grade to be worth mining.
Quartz (from German Quarz (help·info)) is the second most abundant mineral in the Earth's continental crust (after feldspar). It is made up of a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2.