Agate Stone Dealers

  Most agates occur as nodules in volcanic rocks or ancient lavas, in former cavities produced by volatiles in the original molten mass, which were then filled, wholly or partially, by siliceous matter deposited in regular layers upon the walls. Agate has also been known to fill veins or cracks in volcanic or altered rock underlain by granitic intrusive masses. Such agates, when cut transversely, exhibit a succession of parallel lines, often of extreme tenuity, giving a banded appearance to the section. Such stones are known as banded agate, riband agate and striped agate. In the formation of an ordinary agate, it is probable that waters containing silica in solution—derived, perhaps, from the decomposition of some of the silicates in the lava itself—percolated through the rock and deposited a siliceous gel in the interior of the vesicles. Variations in the character of the solution or in the conditions of deposition may cause a corresponding variation in the successive layers, so that bands of chalcedony often alternate with layers of crystalline quartz. Several vapour-vesicles may unite while the rock is still viscous, and thus form a large cavity which may become the home of an agate of exceptional size; thus a Brazilian geode lined with amethyst and weighing 35 tons was exhibited at the Düsseldorf Exhibition of 1902. Perhaps the most comprehensive review of agate chemistry is a recent text by Moxon cited below.  GW885

Root Plume Agate Genuine Natural Loose Gemstone Cabochon Lot Beige 206Cts. 11301 Shipping & Handling Charges:- FREE SHIPPING (Worldwide) Shipping Time & Delivery Time:- Orders are shipped within 24-48 hours, excluding orders made on Friday through Sunday. International orders can take longer 12-15 days to reach. If you select Expedited Shipping Service, you will get your parcel within 6 to 9 days. Please be patient ! Payment Methods:-                       *PayPal only* Please send all payments within 7 days from the end of the auction. Return policy:- if for any reason you are not satisfied with our product,you may return your order within 30 days from the date of shipment. SERVICES:- Stones Drilling:- 0.20USD Per Cabochon Drilling Charge(1.50USD Minimum Drilling Charge) FREE Drilling If you Buy Minimum 50USD Value Items From Our Store. Expedited Shipping Service:- 20USD First Item & 5.99USD Per Additional Items.

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