Chrome Tourmaline

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1584ct Phenomenal Sized Oval Green Chrome Tourmaline    US $12,500.00

2650cts Master Grade Lustrous Chrome Green Tourmaline    US $3,499.00

Precision Cut 170ct Chrome Tourmaline Five Stone Ring R4182 Diamonds by Lauren    US $3,399.00

567ct Flawless Heart Green Chrome Tourmaline    US $2,400.00

Precision Cut 139ct Chrome Tourmaline14K WG Halo Ring R4183 Diamonds by Lauren    US $2,195.00

711Cts Flawless Chrome Green Paraiba Tourmaline $NR    US $1,500.00

INVESTMENT RARE CLR CHANGE CHROME TOURMALINE 4CTS    US $899.99

1090cts Best Gem Piece Lustrous AAA Natural Intense Chrome Green Tourmaline NR    US $899.00

A MUST HAVE FOR ANY GEM COLLECTOR THIS SUPER RARE COLOR CHANGE CHROME TOURMALINE    US $892.50

345ct Enchanting Octagon AAA Chrome Green Tourmaline    US $850.00

779ct Big Hot Chrome Green FL Emerald Scissors Tourmaline NR    US $799.00

940cts Cream Piece Gemmy Lustrous Vivid AAA Natural Chrome Green Tourmaline    US $799.00

Chrome Tourmaline AA Gem Cabochon HS WoW    US $795.00

3 CTFLAWLESS CERTIFIED NATURAL EMERALD TANZANIA RICH GREEN CHROME TOURMALINE    US $780.00

430cts Top Grade AAA Rare Chrome Green Tourmaline Baguette Cut Brazil Unheat    US $699.00

274ct Phenomenal Heart Natural Chrome Green Tourmaline    US $650.00

307ct Phenomenal Round Natural Chrome Green Tourmaline    US $600.00

RARE EXTRA FINE INTENSE COLOR CHROME TOURMALINE PEAR 4 CT    US $558.60

575 Cts GENUINE NATURAL CUSHION CHROME GREEN TOURMALINE GEM    US $520.00

SUPERB Large 10ct Honey Amber Tourmaline Barion Faceted Gemstone Chrome Dravite    US $515.70

902 Cts GHI CERTIFIED NATURAL AAA GREEN CHROME TOURMALINE OVAL    US $499.99

456 Cts Natural Neon Chrome Green Tourmaline Emerald    US $499.00

Awesome Chrome Tourmaline 157 carats    US $470.00

WOW 523ct Flawless Natural Chrome Green Tourmaline    US $469.00

150cts Top Grade AAA Rare Green Chrome Tourmaline Pear AAA Red Under Chelsea    US $429.00

334ct Phenomenal Matched Oval Chrome Green Tourmaline    US $420.00

Excellent Rare Chrome Tourmaline 135 carats    US $405.00

BRILLIANT 135CT GREEN CHROME TOURMALINESQCUSHION CUT    US $400.00

567ct ELEGANT NATURAL LUSTER GREEN CHROME TOURMALINE    US $399.90

8ct Intense Chrome Green Hue Oval Cab Tourmaline    US $399.00

125 ct NATURAL CHROME TOURMALINE    US $399.00

105 ct NATURAL AFRICAN CHROME TOURMALINE    US $399.00

240cts Top Grade AAA Rare Green Chrome Tourmaline Cushion Red Under Chelsea    US $399.00

641ct Hot Chrome Green Emerald Scissors Tourmaline NR    US $399.00

206 CTFLAWLESS NATURAL OVAL TANZANIA RICH PURE GREEN CHROME TOURMALINE    US $374.55

FINE COLOR PERFECT GREEN CHROME TOURMALINE OVAL 2 CT    US $373.80

227C STUNNING TANZANIA SINGLE SOURCE CHROME TOURMALINE    US $359.99

$$FLAWLESS RAVISHING CHROME GREEN TOURMALINE 483CT$$    US $350.00

Precision Cut 087ct Chrome Tourmaline Rich Color R3890 Diamonds by Lauren    US $349.00

FABULOUS GREEN CHROME TOURMALINE FANCY RECTANGLE 2 CT    US $345.80

272CT STUNNING YELLOW GREEN NAMIBIAN CHROME TOURMALINE    US $335.99

PRECISION CUT CHROME TOURMALINE 214ct SPECTACULAR RED UNDER CHELSEA FILTER    US $325.00

$$ INCREDIBLE 100 CHROME TOURMALINE 116CT VVS2 $$    US $300.00

ULTRA RARE RAINBOW CHROME TOURMALINE    US $299.99

PRECISION CUT GENUINE CHROME TOURMALINE 211ct RED UNDER CHELSEA FILTER    US $265.00

160C STUNNING TANZANIA SINGLE SOURCE CHROME TOURMALINE    US $255.99

212CT STUNNING GOLDEN GREEN NAMIBIAN CHROME TOURMALINE    US $255.99

Chrome Tourmaline 5 pcs of 7 x 5 mm 355CTW Private Collection Final Sale    US $250.00

90pc top quality green chrome tourmaline cabochon size 4mm mix lot wholesale    US $250.00

180ct Oval Cut Natural Chrome Green Tourmaline    US $250.00

185ct Rectangle Vivid Green Chrome Tourmaline    US $248.00

272ct Chrome Green Custom Idols Eye Tourmaline 97194    US $245.00

BEAUTIFUL LIGHT CHROME GREEN TOURMALINE OVAL 2 CT    US $245.00

160cts Top Grade AAA Rare Green Chrome Tourmaline    US $240.00

130cts Top Grade AAA Rare Green Chrome Tourmaline Oval AAA Red Under Chelsea    US $229.00

206 CTVVS 1 NATURAL PEAR RICH GREEN TANZANIA CHROME TOURMALINE LOOSE GEMSTONE    US $226.60

31pc top quality green chrome tourmaline cabochon size 6mm mix lot wholesale    US $225.00

544 Cts Collectors Gem PC Huge Natural Chrome Green Tourmaline Gemstone    US $224.68

205 CTVVS 1 RARE NATURAL HEART TANZANIA RICH CHROME GREEN TOURMALINE GEMSTONE    US $223.64

202 CTVVS 1 NATURAL PEAR RICH GREEN TANZANIA CHROME TOURMALINE LOOSE GEMSTONE    US $220.36

33pc top quality green chrome tourmaline cabochon size 5mm mix lot wholesale    US $215.00

136ct VVS Oval Natural Top Green Chrome Tourmaline    US $200.00

138ct VVS Cushion Natural Top Green Chrome Tourmaline    US $200.00

175CT XX RARE TANZANIA SINGLE SOURCE CHROME TOURMALINE    US $199.99

220 Cts GENUINE NATURAL RARE CHROME GREEN TOURMALINE CATS EYE    US $199.99

383ct RARE DEEP SATURATED NATURAL CHROME TOURMALINE OVAL    US $199.99

251ct Phenomenal RARE Cabochon Green Chrome Tourmaline    US $199.00

184ct Beautiful Pear Cut Chrome Green Tourmaline    US $199.00

NATURAL TANZANIA GREEN CHROME TOURMALINE OVAL 137cts    US $190.40

RARE UNIQUE COLLECTORS GEM TRAPICHE CHROME TOURMALINE    US $189.99

PRECISION CUT GENUINE CHROME TOURMALINE 150ct RED UNDER CHELSEA FILTER    US $185.00

260CT100 NATURAL EMERALD CUT GREEN CHROME TOURMALINE    US $180.00

PRECISION CUT CHROME TOURMALINE 135ct SPECTACULAR RED UNDER CHELSEA FILTER    US $175.00

179ct Natural Vivid Green Oval VVS Chrome Tourmaline NR    US $170.00

096ct Vivid Chrome Green Hue Cushion VVS Tourmaline    US $169.00

136CT STUNNING YELLOW GREEN NAMIBIAN CHROME TOURMALINE    US $167.99

156ct VVS Oval Intense Green Chrome Tourmaline    US $165.00

APPLE GREEN GENUINE CHROME TOURMALINE 167ct RED UNDER CHELSEA FILTER    US $165.00

75CT STUNNING RARE BI COLOR NAMIBIAN CHROME TOURMALINE    US $159.99

223 CTS ALLURING OCTAGON CUT CHROME GREEN TOURMALINE    US $159.99

LOVELY MEDIUM GREEN CHROME TOURMALINE PORTUGUESE OVAL 2 CT    US $156.80

FINE COLOR GREEN CHROME TOURMALINE 1 CT PEAR    US $154.00

132CT STUNNING YELLOW GREEN NAMIBIAN CHROME TOURMALINE    US $151.99

GORGEOUS ORANGE CHROME DRAVITE TOURMALINE OVAL 2 CT    US $151.20

40pc top quality green chrome tourmaline cabochon size 3mm mix lot wholesale    US $150.00

127ct Vivid Chrome Green Hue Cushion VVS Tourmaline    US $149.00

158ct Vivid Chrome Green Hue Emerald Step VVS Tourmaline    US $149.00

192ct Vivid Chrome Green Hue Elongated Cushion VVS Tourmaline    US $149.00

184CT NATURAL CHROME GREEN TOURMALINE RARE GEMSTONE FROM NIGERIA JEWELRY    US $149.00

110cts Topgrade Lustrous Best Green Chrome Tourmaline    US $149.00

260ct HI END LUSTROUS BEST GRADE CHROME TOURMALINE    US $145.00

PRECISION CUT CHROME TOURMALINE 120ct SPECTACULAR RED UNDER CHELSEA FILTER    US $145.00

UNUSUAL DICHROIC GREEN CHROME TOURMALINE PORTUGUESE OVAL 4 CT    US $143.50

921ct Natural Green Chrome Tourmaline Facet Rough Gem MADAGASCAR    US $140.73

CALIBRATED 8x6mm GENUINE CHROME TOURMALINE 133ct RED UNDER CHELSEA FILTER    US $134.41

128CTVS STUNNING DARK GREEN NAMIBIAN CHROME TOURMALINE    US $135.99

152ct SHIMMERING VIVID NATURAL CHROME TOURMALINE    US $129.99

190cts Collectors Gem Hi End Top Lustrous Natural Chrome Green Tourmaline    US $129.96

Rare 1003Cts Natural Chrome Green Tourmaline Gemstone    US $128.70

I need some info on Chrome Tourmaline.?

How is it processed or refined?
Is it necessary for commerce or just newly developed?
What is the crystal system, organic structure, chemical and physical properties?
What is the chemical formula?

Here's a good website with a lot of relevant information:

ref: http://www.geo.utexas.edu/courses/347k/redesign/gem_notes/tourmaline/tourm_main.htm

Natural 6.5cts chrome tourmaline gemstone from East Africa