XLarge 2 Lb 14 Oz Natural AMETHYST Crystals w/ Agate Geode Cluster Brazil #8

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XLarge 2 Lb 14 Oz Natural AMETHYST Crystals w/ Agate Geode Cluster Brazil #8 This auction is for the Amethyst specimen #8 pictured in natural light using a Canon digital camera. Amethyst is a violet variety of quartz often used in jewelry. The name comes from the Ancient Greek ? a- ("not") and μ?θυστος methustos ("intoxicated"), a reference to the belief that the stone protected its owner from drunkenness; the ancient Greeks and Romans wore amethyst and made drinking vessels of it in the belief that it would prevent intoxication. It is one of several forms of quartz. Amethyst is produced in abundance from the state of Minas Gerais in Brazil where it occurs in large geodes within volcanic rocks. Amethyst also occurs at many localities in the United States. Among these may be mentioned: the Mazatzal Mountain region in Gila and Maricopa Counties, Arizona; Red Feather Lakes, near Ft Collins, Colorado; Amethyst Mountain, Texas; Yellowstone National Park; Delaware County, Pennsylvania; Haywood County, North Carolina; Deer Hill and Stow, Maine and in the Lake Superior region of Minnesota, Wisconsin, Michigan, and Ontario in Canada. The largest amethyst mine in North America is located in Thunder Bay, Ontario. Amethyst is the traditional birthstone for February. Chemical formula Silica (silicon dioxide, SiO2) Color Purple, violet Crystal habit 6-sided prism ending in 6-sided pyramid (typical) Crystal system rhombohedral class 32 Twinning Dauphine law, Brazil law, and Japan law Cleavage None Fracture Conchoidal Mohs scale hardness 7–lower in impure varieties Luster Vitreous/glossy Streak White Diaphaneity Transparent to translucent Specific gravity 2.65 constant; variable in impure varieties Optical properties Uniaxial (+) Refractive index nω = 1.543–1.553 nε = 1.552–1.554 Birefringence +0.009 (B-G interval) Pleochroism None Melting point 1650±75 °C Solubility insoluble in common solvents Other characteristics Piezoelectric Courtesy of Wikipedia PayPal is preferred. Credit/Debit cards and checks accepted through PayPal but please allow up to 10 additional days for PayPal checks to clear. Make checks payable to: Daryl Keller. COMBINED SHIPPING: If you are bidding on multiple items, please pay once after your last item closes so that the Combined Shipping discount can be applied. The discount consists of the highest shipping cost item, plus 50% off your second items' shipping cost. Buy 3 or more items and the shipping is FREE unless otherwise stated. The international Combined Shipping discount consists of the highest shipping cost item, plus 20% of each additional items' shipping cost. U .S. SHIPPING: Shipping is flat rate USPS First Class (under 14 ounces), Priority Mail (over 13 ounces) and Parcel Post or other carriers for large items. We reserve the right to change shipping carriers and methods. Items are normally shipped within one business day, but please allow up to three business days. U.S. Territories, HI and AK may take up to 14 days for delivery. In case of shipping damage, please provide us with the item number and the date the shipment was received. If we can't replace the item with an identical or equivalent item, we will refund your payment in full. INTERNATIONAL SHIPPING: International orders shipped USPS First Class or Priority Mail. Shipments can take between 4-6 weeks for most countries including Canada. Shipping can be upgraded to USPS International Priority Mail for a small fee. Please email us for details. Buyers are responsible for customs fees. Combined shipping for international shipments consists of the highest shipping cost item, plus 20% of each additional items' shipping cost. Please email us prior to checkout so we can apply this discount. Please consult photographs for item condition, details, etc. Normally, a penny, ruler or other item is included in the photographs for scale. Photos are taken in with a Canon digital camera in natural light unless otherwise specified. We strive to take accurate photo... read more

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