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What is the purpose of using blue glass in identifying sodium and potassium? (flame test)?
I think I understand why in Sodium, but not in potassium. The color of potassium without blue glass is lilac, no? Is it because both have large concentration in sodium in it?
Sodium in a flame test should appear bright yellow. When viewed through a blue glass this will look green (Blue and yellow = green)
Potassium in a flame test is a red/purple colour. When viewed through a blue glass, it should be very difficult to see…if at all!
Hope this is of some help.
Cheers 
Glass Blowing – Fish – Bristol Blue Glass
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Daum Crystal DISCOBOL BLUE 03432 New In Box MINT $73,300.00 |
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Totally Glassy Transparency LIGHT BLUE Praying Kwan Yin Pendant w/18K Gold Clasp $39,999.99 |
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C. 1919 RENE R LALIQUE ELECTRIC BLUE PERRUCHES VASE $34,999.00 |
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Pfaulder 800 gallon Blue Glass Reactor $32,000.00 |
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Blue Glass Reactor 800 Gallon Capacity $32,000.00 |
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Picasso, Pablo, Colombe de paix (Dove of Peace), Blue Glass Relief, Unique, 1962 $25,000.00 |
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Daum Crystal CRESUS BLUE 03254 New In Box MINT $24,500.00 |
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Daum Crystal TULIPE BLUE VASE 03375-4 New In Box MINT $19,330.00 |
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Daum Crystal ORCHID DARK BLUE VASE 05103 New In Box MINT $15,375.00 |
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Dale Chihuly Original Glass Massive Macchia Bowl 28″x29″x20″ Blue/Red/Yellow $14,999.99 |
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Daum Crystal BLUE OIL HEAD 03737 New In Box MINT $14,140.00 |
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STUNNING R. LALIQUE “PIRIAC” VASE, DARK BLUE STAINING $4,395.00 |
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GORGEOUS R. LALIQUE “DRUIDES” VASE, AQUA BLUE STAINING $4,299.99 |
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Antique Slag Stained Blue Glass Panel Carved Lace Metal Iron High Table Lamp $3,999.99 |
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GORGEOUS LALIQUE “CHARDONS” VASE – DARK BLUE STAINING $3,999.99 |
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New Authentic LALIQUE Tourbillons Ferrat Blue Vase NIB $4,000.00 |
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Northwood Carnival Glass Electric Blue Poppy Show Plate Exceptional! $4,000.00 |
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★Rarest CARNIVAL GLASS TUMBLER on EBAY IMPERIAL GLASS★CONE and TiE ELECTRIC BLUE $3,996.00 |
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Vintage LIZZIE’S GROCERIES MEATS BEER & WINE LIGHTED SIGN RED BLUE GREEN GLASS $3,995.00 |
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SIGNED Vase BENJAMIN MOORE Inc 1985 Master GLASS Artist SWIRLING Clear and BLUE $3,900.00 |
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Daum Crystal BIRD OF PARADISE BLUE-GREEN VASE 03974-1 New In Box MINT $3,805.00 |
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WONDROUS Large ARCHIMEDE SEGUSO Murano VASE Exquisite BLUE & GOLD Glass VINTAGE $3,600.00 |
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Jean Claude Novaro Fluted Dancing Bubbles, Orange& Blue $3,500.00 |
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ANTIQUE STEUBEN IRIDESCENT BLUE AURENE 2680 SET OF SIX SHERBETS & UNDERPLATES $3,500.00 |
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art deco french cameo glass vase degue goemetric blue $3,390.00 |
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new Baccarat Psydelic 30″ Necklace Blue 2″ Scarabee 10 Amethyst Stone BRAND NEW $3,200.00 |
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RARE BLUE OPAL SWIRL THREE TIER ART GLASS BANQUET LAMP $3,195.00 |
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Blue Horizontal Mosaic Glass Tile / 220 sq ft / Kitchen Backsplash Bathroom Show $3,080.00 |
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Blue Curved Mosaic Glass Tile / 220 sq ft / Kitchen Backsplash Bathroom Shower $3,080.00 |
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Royal Blue Triomphale Plate Designed for Daum France by Salvador Dali $2,999.00 |
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Silvertone Blue Glass Bracelet $45.49 This bracelet sparkles with prong-set blue glass. This bracelet is crafted in brass accented with a high polish silvertone finish. |
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Sterling Silver Blue Glass Evil Eye Necklace $21.99 An ‘evil eye’ pendant dangles from this rhodiumplated .925 sterling silver box chain. This vibrant blue eye necklace secures with a spring ring clasp. |
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Brushed Nickel Blue Glass Mini Pendant Light $35.99 Brighten your home decor with this beautiful mini pendantElegant hanging fixture features a brushed nickel finishStylish light showcases fashionable blue glass |
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Fuseworks Dichroic Blue Glass $7.29 Add dimension to your Fuseworks glass projects with dichoric blue glassScrapbooking accessory brings surface variety to your fuse glass projectsDiamond Tech Crafts set helps make beads and other embellishments |
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Blue Glass Beaded Necklace(Kenya) $17.99 Accent your look with a stunning choker necklaceNecklace showcases lovely blue glass beadsHandmade jewelry makes a great complement to nearly any ensembleJedando Modern Handicrafts |
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Stainless Steel Red and Blue Glass Square Ring $19.49 Red and blue glass ringStainless steel jewelryClick here for ring sizing guide |
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La Preciosa Silverplated Blue Glass Bead Charm Bracelet $19.99 This stunning bracelet by La Preciosa shines with blue glass beads. This jewelry piece features a snake chain and a lobster claw clasp. |
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La Preciosa Glass Silverplated Blue Glass Bead and Charm Bracelet $22.49 This pretty bracelet from La Preciosa features blue glass beads in various designs that alternate with silverplated beads and a single charm bead. The snake bracelet is crafted of silverplated base metal and secures with a lobster claw clasp. |
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Success Blue Glass and Seed Beaded Necklace (Kenya) $20.99 Add a colorful touch of style to your wardrobe with striking jewelry from Kenya. This handmade necklace offers three strands of blue glass and seed beads. |
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Sterling Essentials Sterling Silver Blue Glass and Clear Cubic Zirconia Diana Ring $39.99 Blue glass and cubic zirconia Diana ringSterling silver jewelryClick here for ring sizing guide |
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Wrap Bracelet with Blue Glass Bead (India) $15.49 This nickel-plated wrap bracelet features a blue glass bead creating a lovely accent to any wardrobe. This piece was handmade in India. |
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Retro Blue Glass Vase with White Wooden Case $37.99 This retro-inspired water-tight vase is made with tinted blue glass enclosed in a grey wooden case. This stylish vase will make a stunning and eye-catching centerpiece for the office or any room in your home. |
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Silver Metal Green and Blue Glass Bead Charm Necklace (India) $29.99 With a fashionable clustered pendant of fused glass in green and blue, this necklace will lend you that ideal touch of style. The attractive necklace is handcrafted with silver metal. |
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La Preciosa Silverplated Blue Glass Mom Bead Charm Bracelet $19.99 This stunning bracelet by La Preciosa shines with blue glass beads. This jewelry piece features a snake chain and a lobster claw clasp. |
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Kraus Irruption Blue Glass Vessel Sink $109.95 Irruption blue glass vessel is a perfect harmony of elegance and styleSink will turn and ordinary bathroom into a lavish and trendy spaceElegant vessel sink features solid tempered glass construction |
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Silver Blue Glass Drop Earrings (Chile) $16.99 Add an elegant touch to your wardrobe with handmade jewelry from Chile. These sparkling blue earrings feature small rectangles of shimmering glass dangling from silver hooks. |
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Neno Buscotti Silvertone Clear Cubic Zirconia and Blue Glass Band $51.99 Clear cubic zirconia and blue glass ringSilvertone brass jewelryClick here for ring sizing guide |
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DonnieAnn Blue Glass Vase with White Wooden Case $38.99 This retro-inspired water-tight vase is made with tinted blue glass enclosed in a white wooden case. This stylish vase will make a stunning and eye-catching centerpiece for the office or any room in your home. |
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Pretty Little Style Silverplated Blue Glass Wire Wrap Earrings $14.99 These beautiful handmade dangle earrings offer a vintage yet elegant look with blue glass stones wrapped in strands of silverplated wire. The earrings offer a satin finish and secure with hook findings. |
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Aeravida Blue Glass Daisy Prism Pin-Brooch (Thailand) $29.99 A perfect complement to any outfit, this jewelry features blue glass prism and crystals in a cute floral design. This pin/brooch was handmade in Thailand by artisan Khun Nok. |
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Blue Glass Puzzle Piece Necklace $22.99 The puzzle piece, the international symbol for autism, is uniquely represented in this handmade glass necklace with three puzzle pieces etched into a busy, colorful rectangle of glass. This beautiful glass necklace hangs from a slip knotted cord. |
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Faceted Blue Glass Earrings (Thailand) $18.99 Grace your ensemble with these delightful earrings hand-crafted from teal glass and silver beads. Each earring features two multi-faceted beads of light-catching, azure glass set on either side of an antiqued silver bauble. |
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Kraus Irruption Blue Glass Vessel Sink/ Waterfall Faucet $239.95 This unique glass vessel sink and waterfall faucet combination is both stylish and exquisite. This alluring faucet will turn any bathroom into a lavish and trendy space while the angle of light will change the colors from dark to light blues. |
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Waxed Cord Blue Glass Cat Necklace (Chile) $21.49 With a delightful cat pendant of blue fused glass with black swirls, this necklace will lend you that ideal touch of style. The attractive necklace is handcrafted with a sliding waxed cord. |
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Lampwork Blue Glass Starfish Ribbon Necklace (China) $23.49 Handmade lampwork glass shaped like a starfish hangs from three waxed cotton cords and an organza ribbon on this necklace. Glass pendant is 2 inches wide with self bail, silver metal lobster claw clasp and 2.5-inch extension chain. |
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Silver Faceted Sky Blue Glass Bracelet (Thailand) $19.49 Entwine the heavens around your wrist with a celestial bracelet of faceted glassWorld jewelry features silvertone beads and silver claspThis bracelet is adorned with beads of the bluest crystalline glass |
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Silver Faceted Sky Blue Glass Necklace (Thailand) $19.99 Capture the light, elemental essence of air and wind with an ethereal sky blue necklaceHandmade world jewelry piece is crafted of crystal-like faceted glassGraceful piece features alternating silver-tone beads for extra glitter |
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Copper Recycled Blue Glass Square Earrings (Chile) $17.49 These handmade diamond-shaped copper earrings showcase an embossed square of blue recycled glass in the center. These earrings hang from hook findings and feature a natural patina. |