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NATIVEGOLD QUARTZ fromthe Original Sixteen to One Mine, Sierra Cty. California
Ruler is 1/4\" wide (6 mm). U.S. 10 cent coin is 17.8 mm in diameter.Specimen weight: 3.4Gram - 52.9Grains Size: 18.1X14.8X9.9mmThe white rock shown here contains VG (visible gold). This ore sample originated in a historic, Alleghany district, hard-rock mine. Gold ores around the globe are so mineralogically diverse that once you enter the mysterious realm of gold, best be prepared for a wild ride. In my book, gold still inside it\'s host rock (usually quartz) is the most interesting mineral association there is. There\'s no need for a pocket lens to see the gold here. All my gold quartz specimens (and cabs) show VG (visible gold) and are naturally-occurring.
I don\'t deal in low grade ores, period. Most specimens offered at Gold of Eldorado are from California and a few other U.S. mining states, but a few come in international flavors. These high-gradebeautiesare hard to find. If, instead, your mining modus operandi is swinging a \'silver pick\', neither are they cheap. My prices aren\'t based on how much gold there is, but on the fact that it\'s there - authentic, rare, and natural.
U.S. SHIPPING - $6.00(via USPS 1st class)
FAST REFUND OFFERED (If, for any reason, you\'re not happy with this item)For years, I scoured through old mining dumps examining every manner of rock with my pocket lens, aka loupe. In all that time, I neverfound one piece with VG (visible gold) you could actually see. That\'s still hard for me to fathom.
Hydrothermal solutions under intense pressure carry super-heated, dissolved gold, silica, and assorted minerals. These are injected into fissures, faults, shear zones, and other permeable rock formations. As these pregnant waters cool down, the minerals carried inside them crystallize and metal-bearing, hard rock ore bodies are born. That\'s basically how auriferous quartz veins come into being. In states like Nevada, even larger ore bodies have been discovered in recent years. These are currently being mined on a large scale.
Weight Conversions: 15.43 GRAINS = 1 GRAM31.103 GRAMS = 1 TROY OUNCE24 GRAINS = 1 PENNYWEIGHT (DWT) 20 DWT = 1 TROY OUNCE480 GRAINS = 1 TROY OUNCES & H Discounted for combined shipments. U.S. BUYERS & INTNL.
PAYMENTS For U.S. buyers: We accept paypal For intnl. customers: We accept paypal. Pay securely with [link removed by ]. Payment must be made within 7 daysfrom close of sale. We ship as soon as funds clear. If you have questions, please ask them before offerding. REFUNDSWe leave no stones unturned insuring our customersget whatthey bargained for.If you\'re not satisfied with thisitem, contact me. Then, if the problem can\'t be fixed,returnproduct within 30 daysin \'aspurchased\'conditionfora fullrefund
Geology of The Sixteen to One MineDuring the past 20 + years, research in the fields of thermodynamics, geochemistry, and plate tectonics has greatly improved our understanding of crustal evolution and the distribution of metals within the earth’s crust. Across the globe, whether in North America, South America, Canada, Asia,Africa, Europe, Australia, China, Russia, the Philippines, or one of many regions where major gold deposits are found, a suite of rocks referred to as greenstones exist. The name greenstone refers to the color of the rock acquired during metamorphism: greenschist facies metamorphism.In the state of California, the Mother Lode and Alleghany mining districts lie within a greenstone belt that contains world-class gold deposits, one of which is the Sixteen to One vein system. With past production of more than 31 metric tons of gold, it\'s renowned for producing high-grade pockets of gold.
For over 85 years, our understanding of how this deposit formed has been evolving. A process called carbonate metasomatism formed ribbon quartz veins along en echelon faults that are secondary to the crustal suture known as the Melones fault. These secondary veins (the Sixteen to One) form by replacement as aqueous fluids ascending through cracks in the earth’s crust, removed accessory cations from wall rock minerals.
The Melones fault is the remnant of a compressive or transpressional environment common to convergent plate margins. This fault marks the boundary along which oceanic crustal rock is emplaced against the continent. The fracture system along which the quartz veins formed is an expression of the forces and motion along the crustal suture. The Alleghany fracture system originates at the Melones fault which is the conduit for the large volume of fluid that formed the vein system. The volume of fluid can be calculated with reasonable accuracy because the fluid composition is known from fluid inclusion chemistry. The volume of the end product, which is quartz, is known from mining. Fluid chemistry assures us that there is vein continuity to the depth of the Melones fault. HS!!
Thanks forchecking out our digs.
Gold ofEldorado1-14-13
