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 Art Nouveau Sterling Silver Ring w Blue Turquoise US $39.99 
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 Vintage Sterling Silver Screwback Earrings Turquoise Wedge Shaped Stones US $15.00
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 c 1900 STERLING SILVER TURQUOISE Navajo NATIVE AMERICAN CROSS PENDANT & CHAIN US $97.00
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 VINTAGE LOS CASTILLO TURQUOISE STERLING SILVER EARRINGS US $75.00
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 Vintage Sterling Silver Southwestern Turquoise Ring 9.7 Grams Size 9.5 IN:O176 US $39.99
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 Ancient Civ 40s Turquoise Sterling Bird Earrings US $29.95
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 Turquoise,Onyx,MOP,Sterling Silver Cuff Bracelet US $75.00
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 Sterling Silver/Turquoise Old Pawn Bracelet US $350.00
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 Sterling Silver/Turquoise Old Pawn Bracelet Signed JY US $195.00
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 Sterling Silver Turquoise Cuff Bracelet US $325.00
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 VINTAGE SET EARRINGS PENDANT STERLING SILVER NATURAL TURQUOISE 925 BEAUTIFUL! US $135.00
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 Vintage cross turquoise coral sterling charm US $24.99
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 VINTAGE Sterling Silver TURQUOISE Pendant Ring HOOP Earrings TRIBAL Jewelry LOT US $47.00
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 Estate Circa 1950s Zuni Petit Point Turquoise & Sterling Silver Ring Size 7 US $79.00
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 OLD Navajo Handmade Sterling Silver Bead Turquoise Nugget Necklace Signed US $129.00
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 Large 2" VICTOR JAIMEZ Mexican Sterling Silver & Turquoise Pin Pendant Eagle 4 US $129.00
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 Old Navajo Turquoise Sterling Bracelet Hand Stamped Detail For Small Wrist 6" US $69.00
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 Sterling Silver Turquoise Navajo Ring US $19.99
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 Ancient Civilization 50s Turquoise Sterling Flower Ring US $39.95
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 VINTAGE FRED HARVEY ERA STERLING SILVER BIG TURQUOISE CUFF BRACELET NAVAJO DESIN US $61.00
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 Sterling Silver Turquoise Bracelet US $350.00
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 JEWELLERY VINTAGE STERLING SILVER INLAID TURQUOISE FISH BROOCH US $13.51
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 DECO STERLING SILVER TURQUOISE ENAMEL HAT EARRINGS 925 US $75.85
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 STUNNING VTG DECO TURQUOISE,STERLING.S BRACELET US $276.55
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 Vintage Sterling Charm/Pendant Turquoise on Turquoise US $9.00
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 Superb Vintage Sterling ~ Turquoise ~ Coral Hand Made Belt Buckle ~ Quraishi US $111.11
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 VTG HEAVY BIG ARTIST TURQUOISE STERLING RNG SIZE 6.5. US $89.00
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 Collectible Sterling with Turquoise Custom Made Bolo Tie - Southwest Artisan - US $30.00
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 Wonderful Vintage Lge Hobe Sterling & 14K Overlay & Turquoise Stone Pin Brooch! US $49.99
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 Vintage .925 sterling silver reversible Turquoise heart & cross ring - Size 8 US $15.00
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 Men's Crafted Sterling Silver Turquoise Ring, Very Heavy, Size 12 1/2, 33.5g US $94.00
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 Superb Turquoise & Sterling Silver Ring HUGE 29gr Stunning Handcrafted 9 - 9.25 US $115.00
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 VINTAGE TURQUOISE BELT NECKLACE STERLING SILVER NATIVE AMERICAN US $199.00
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 VINTAGE NAVAJO INDIAN STERLING SILVER TURQUOISE & ARROWS CUFF BRACELET US $135.00
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 HUGE TURQUOISE GEMSTONE STERLING SILVER ARTICULATED PENDANT US $9.47
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 VINTAGE STERLING SILVER TURQUOISE BAND RING with 2 FREE RINGS US $15.99
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 VINTAGE HANDMADE STERLING SILVER BRASS TURQUOISE CUFF BRACELET US $149.00
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 VINTAGE NAVAJO INDIAN TURQUOISE STERLING SILVER LITTLE RAM PIN US $65.00
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 VINTAGE SIGNED STERLING SILVER &TURQUOISE 3 SLIDE BRACELET 22.5 GRAMS US $54.79
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 Vintage Dead Pawn 1930's Sterling Turquoise Ring US $125.00
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 STERLING SILVER MEXICAN TAXCO TURQUOISE ONYX BROOCH EARRINGS US $9.99
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 STUNNING VTG STERLING S.TURQUOISE CELTIC EARRING 925 US $50.57
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 Vintage Antique Turquoise & Sterling Silver Earrings Feathers US $50.00
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 Vintage Antique Turquoise & Sterling Silver Earrings Paddles US $50.00
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 Vintage Sterling Silver - Antique Ornate Set Green Turquoise - Ring (6) XB687 US $13.99
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 CHUNKY STERLING SILVER RING TURQUOISE CORAL CUT OUT FILIGREE SCROLL BAND US $9.99
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 Vintage Sterling Silver - Southwest Turquoise W Moonstones - Ring (7.5) XB623 US $11.49
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 Vintage Sterling Ring - Turquoise Cabochon with Southwestern Designs US $7.00
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 Vintage Sterling Ring - Excellent Turquoise w Leaf - Hand Signed US $36.00
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 Vintage Antique Sterling Silver & Turquoise Earrings Screwback US $4.00
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 SOUTHWESTERN STERLING SILVER TURQUOISE & CORAL CHIPS INLAY ETERNITY RING US $3.25
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 Gorgeous Sterling Silver Necklace with turquoise bezel set stones Mexico 925 US $89.30
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 Gorgeous Sterling Silver Cross Pendant with Turquoise Bezel Set Stones US $12.90
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 VICTORIAN STYLE STERLING SILVER CROSS PENDANT WITH GREEN TURQUOISE STONES US $7.20
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 Stunning Vintage Sterling Silver TURQUOISE STONES EARRINGS 925 SSTAMPED US $17.10
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 Vintage Sterling Post Earrings - Turquoise Triangles US $16.00
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 VTG VICTOR MOSES BEGAY VMB TURQUOISE STERLING BRACELET US $349.99
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 GREEK TURQUOISE ANTIQUE STERLING SILVER 925 NECKLACE CODE 4 US $77.00
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 Vintage Antique 925 Sterling Silver & Turquoise Lg Round Pendant Brooch Mexico US $30.00
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 Vintage MARCASITE Tribal TURQUOISE Sterling Silver REPAIR 6 RING Jewelry LOT US $32.55
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 Signed MRH Sterling Silver 925 Crushed Turquoise & Coral Inlay Cuff Bracelet US $89.99
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 VINTAGE STERLING SILVER/COIN SILVER NATIVE AMERICAN TURQUOISE CUFF BRACELET US $100.00
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 Vintage Barse & Co 2.5ctw Turquoise Sterling Silver Flower Pendant Necklace 3.8g US $20.50
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 Vintage Sterling Turquoise and Coral Ring Handmade Leaf/bead design Size 13 US $219.99
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 Tribal Handcrafted Vintage Turquoise Sterling Silver Tear Drop Pendant US $54.99
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 Vintage Lot 2 Sterling Silver Mexico Pair Set Earrings Turquoise Stone LOVELY US $39.95
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 VINTAGE ZUNI INDIAN STERLING SILVER TURQUOISE ROW CUFF BRACELET US $185.00
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 Vintage Bird Sterling Silver Brooch Pin Signed Peru G Laffi Turquoise US $95.00
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 Vintage Sterling Silver Turquoise Mother Pearl Pendent US $39.99
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 VINTAGE ZUNI INDIAN STERLING SILVER TURQUOISE FLOWER DANGLE PIN US $185.00
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 Vintage Sterling Siver green turquoise cuff bracelet US $22.50
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 Bold Size 8 1/2 Sterling Ring Greenish Turquoise Oval Southwest Signed FT Vtg US $85.00
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 VINTAGE MEXICO INDIAN DESIGN STERLING SILVER TURQUOISE HAIR BARRETTE US $125.00
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 STERLING SILVER/COIN SILVER VINTAGE TURQUOISE HANDMADE RING SIZE 8 US $30.00
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 STERLING SILVER/COIN SILVER VINTAGE TURQUOISE HANDMADE BEAR CLAW RING SIZE 12 US $65.00
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 LARGE Vintage Signed VIGUERAS STERLING SILVER & Turquoise Flower Pin/ Brooch US $145.00
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 VINTAGE SAM GRAVES STERLING SILVER TURQUOISE EARRINGS US $130.00
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 Vintage STC Southwestern Turquoise Mosaic Sterling Silver Cuff Bracelet US $99.99
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 Old Vintage Beaded Earrings Sterling Silver French Hooks Glass Beads Turquoise US $2.95
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 STERLING SILVER AND TURQUOISE ARROW BOLO TIE 19 INCHES LONG US $47.99
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 Vtg Bolo/Bola Tie with Lovely Royston Turquoise, Sterling Silver Leaves and Tips US $26.00
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 LOVELY STERLING SILVER TURQUOISE INLAY RIBBED DESIGN SOUTHWESTERN STYLE RING US $4.99
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 Vintage .925 Sterling Silver Red & Blue Turquoise Ladies Ring - Sz 7 - FVJ-MB6 US $8.50
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 Vintage Southwestern Turquoise Sterling Silver Handmade Ring Size 7.5 US $49.99
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 Vintage Sterling Silver Grn Blue Turquoise Pendant Oval US $65.00
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 Sterling Silver Turquoise Pendant Triangle ChunK Big US $65.00
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 VINTAGE SOUTHWESTERN STERLING SILVER TURQUOISE WHITE HEISHI NECKLACE US $110.46
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 Vintage Estate Jewelry - Bracelet - Navajo Sterling & Turquoise US $99.99
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 Vintage Estate Jewelry - Bracelet - Sterling With Turquoise Nuggets US $19.99
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 Sterling Silver Pearl Chunk Turquoise Bead Necklace US $175.00
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 Loyolita Othole Turquoise Coral Sterling Silver Ring Zuni US $169.99
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 Loyolita Othole Turquoise Sterling Silver Ring Zuni Artist Signed US $169.99
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 Sterling Silver Turquoise Stone Pendant Necklace (C71) US $20.49
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 Vintage Turquoise Old Mexico 925 Guad RMS Sterling Wide Flexible Cuff US $60.00
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 VINTAGE STERLING W. WHITEGOAL TURQUOISE NAVAJO RING SZ 6 US $79.99
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 Estate Natural Cut 1.80ctw Turquoise Sterling Silver .925 Ladies Ring 6.2g US $3.25
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Sterling Turquoise
Project 2 Part 1 of 18, Sterling Silver and Turquoise Ring
A Note on Stabilizing Turquoise
Turquoise is a mix of copper and aluminum compounds. These compounds are usually in the form of hydrous phosphates of these two elements, along with other secondary compounds. Though the quantities of the secondary compounds are usually quite small, they can have a significant impact on the overall properties of the turquoise specimen. Look at your silver turquoise pendants, and in most cases, you will see that the stone has a deep sky blue color. This color is due to the presence of copper. If the specimen contains trace amounts of iron, the color would gain a greenish tinge. On the rare occasion when zinc enters the matrix, the color tends to be yellow. In the vast majority of cases, natural turquoise is quite soft, light, and porous. This makes it very difficult to cut and polish the stone. Even after the jewelry has been made, the turquoise tends to absorb moisture and oils from the skin and gradually weakens and deteriorates with time. Less than five percent (less than three percent, by some estimates) of the world’s turquoise is of good enough quality to be directly used in jewelry. Natural turquoise is rare and therefore very costly. This makes it impossible to use natural turquoise in fashion jewelry designs. To overcome this problem some bright gemologists came up with a few different innovative methods to improve the quality of moderate and even low quality turquoise specimens so that this beautiful and popular gemstone could be used in fashion jewelry in a cost effective manner.
- The most basic form of stabilization is to coat the surface of the stone with wax or vegetable oil. This process has some very minor effects on sealing the pores on the surface of the stone, and gives the stone a shine. However, the treatment is very temporary in nature and as such is not effective in improving the overall quality of the stone.
- The most commonly used technique of stabilization is to treat the stone with a clear epoxy resin. The resin is used in liquid form. The stone is kept immersed in the epoxy resin liquid where capillary action sucks the liquid into the pores, or the liquid is infused into the stone by simultaneous application of pressure and vacuum. The resin penetrates the stone and is allowed to harden. This process reduces the pore space within the stone making it less susceptible to absorption of liquids. The stabilized stone is also easier to handle and can be polished to have a shinning finish. An experienced gemologist can under magnification, identify whether or not the stone has been stabilized using this method.
- State-of-the-art in turquoise stabilization is to use vaporized silica. Silica in vapor form is infused into the stone. Similar to epoxy stabilization, this process reduces the porosity of the stone and makes it suitable for jewelry applications. The process is however much more complex that epoxy resin stabilization, and must be carried out under controlled conditions in a laboratory with proper health and safety safeguards in place. When performed effectively, silica stabilization is so good that not even an experienced person can examine the stone and say with confidence whether or not the stone was stabilized.
Turquoise that has been stabilized using resin or silica is suitable for fashion jewelry applications such as turquoise pendants, accessory beads in a cultured pearl necklace, or even sterling silver jewelry where turquoise is the only gemstone. Gemologists and jewelers consider stabilized turquoise to be genuine turquoise, although the ethical sellers will clearly inform you in the turquoise you are buying is natural or stabilized. It is important to note that without the process of stabilization most of the southwestern jewelry on the market today would not have been possible.
About the Author
Dale is a geo-professional in the Southwestern United States, and an avid and amateur gemmologist and a fashion jewelry buff.
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