http://www.diamondsonauction.com/facet-rough/
Facet Rough
Chocolate Diamonds in the Rough
The cliché expression "diamond in the rough" is intended to describe one's potential. Given the chisel of experience or the pressure of training and discipline, one might transcend a rocky, coal-like estate into a shining white diamond. But what if we simply change our perspective on what is technically "rough"? What if the diamond doesn't change, but everyone else changes their opinion of the diamond? That is essentially what happened with chocolate diamonds.
Since 1976, the Argyle Diamond Mine of Western Australia has produced brown colored diamonds. It is now the world's largest producer of these rocks. Initially, these kinds of gemstones were regarded as defective and inferior. The reason for this judgment is that in order for a diamond to exhibit color, it must possess trace elements such as boron or nitrogen; or else the diamond has a particular bending in its structure that occurred while it was subjected to temperatures well over 2,000 degrees Fahrenheit. Under this kind of temperature and extreme pressure, carbon atoms can do various things. In other words, the rock is not pure carbon. It has other elements or divergent shapes.
Geologists know why a diamond might be yellow, purple, or blue. They understand the elements and the structural characteristics that produce these hues. However, it is still somewhat a mystery as to why a diamond might be brown or the very Rare Pink color. Still the hardest substance on earth, though, chocolate diamonds were for many years mined in Australia primarily for industrial use.
Somewhere along the line jewelry designers such as LeVian noticed how beautiful chocolate diamonds were when mixed with white diamonds. They also noticed how well brown diamonds blended with popular earth tones. Suddenly, these "flawed" diamonds started to become as popular as the traditional colorless variety. Now billions of dollars of diamond sales are of the chocolate variety. Argyle Diamond Mine produces over a third of the world's total diamond supply annually. Even cultured diamonds, the kind made in a laboratory, are turning out brown colored gemstones to take advantage of this fashion trend.
So who is wearing these former industrial rocks? The King of Thailand has the world's largest faceted diamond, which happens to be of the chocolate variety. The Golden Jubilee weighs 545.67 carats. The next time there is a "red carpet" event, pay attention to how many brown diamonds you see. Chocolate is all the rage in Hollywood. Ask your local diamond retailer how well these brown diamonds sell. Besides their proliferation online and in traditional "brick and mortar" stores, you will see chocolate, champagne, or fancy brown diamonds offered on every television shopping channel and in traditional mail order catalogs.
So it is possible that a "diamond in the rough" is someone that needs to be changed through training and discipline, like an athlete with raw talent, or a musician. It is also possible that the perception of everyone else is "in the rough" and given time and the right circumstances, the right voice, or the right vision; they are the ones who will ultimately change.
About the Author
Lee Edward writes articles that feature
brown diamonds
and the growing popularity of
colored diamonds.
why diamond testers do not work on rough minerals.Is it because the tester is based on light refraction.?
if a diamond is not faceted its light refraction is not reading the standard dispersion level as it would at brilliant cut level .specific gravity nevers lies so what is really going on with these so called diamond testers?
There are two basic types of diamond testers. The first uses the thermal conductivity of diamond. It is used by pressing the tip of a heated probe against the surface of the stone and the electronics calculate the cooling rate. This type of tester functions perfectly well (within its limits) on rough stones.
The second type is known as a reflectometer and works by measuring the light reflected from the surface of a cut and polished stone and this reflection is converted into a Refractive Index reading by the machine. For this tester to work the stone must have a clean, highly polished surface for the test to be applied to. The standard jewellers refractometer does not have a range wide enough to accommodate diamonds.
Diamond testers on the market today do not use dispersion, specific gravity or refractive index (in a directly tested method) in their operation.
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TEAL 880+ CARATS CUBIC ZIRCONIA FACET ROUGH $88.99 |
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Amethyst-gem facet rough from Madagascar-150carats $9.99 |
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Imperial Topaz-orange facet rough crystal-20 carat lots $9.99 |
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Garnet mine rough-facet/cab red/orange-1000 carat lots $9.99 |
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Sphene-gem facet mine rough from Mexico-150 carat lot $9.99 |
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Blue Tourmaline-facet rough-Nigeria-25 carat lots $9.99 |
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Blue Sapphire gem rough-Nigeria star/facet-75cts $9.99 |
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Amethyst-facet/cab rough from Africa-600 carat lots $9.99 |
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Scapolite-Violet gem facet rough Tanzania-150 carat lot $9.99 |
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Amethyst-facet/cab/tumble rough from Bolivia-1/2 pound $9.99 |
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Kunzite-gem facet Afghani pink kunzite rough-25 carats $9.99 |
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Garnet mine rough-facet/cab red/orange-1000 carat lots $9.99 |
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Petalite-gem facet mine rough-200 carat lot $9.99 |
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Amethyst-CLEAN facet rough from Tanzania-500carats $19.99 |
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Amethyst-CLEAN facet rough from Tanzania-200carats $9.99 |
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13.45 CT.Green Apatite Facet Rough Natural $0.99 |
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17.70 CT.Green Apatite Facet Rough Natural $0.99 |
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27.60Ct.Natural Yellow Citrine Facet Rough $0.99 $0.99 |
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31.10Ct.Natural Fancy Spinal Facet Rough $0.99 $0.99 |
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9.10Ct.Natural Green Tourmaline Nigeria Facet Rough $0.99 |
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Demantoid-Gemmy demantoid garnet facet rough-50 carats $9.99 |
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56.80ct NATURAL BLACK SPINEL FACET ROUGH $0.99 |
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29 ct rare eye clean facet rough citrine crystal $24.00 |
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Garnet mine rough cab/facet/tumble-small pieces-500ct $6.99 |
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Hessonite-Afghani hessonite facet/cab rough-100 carats $9.99 |
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Fluorite-all natural blue/green facet/cab rough-1/2# $5.99 |
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Red/pink tourmaline facet rough-20 carat lots $24.99 |
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Red/pink tourmaline crystal facet rough-20 carat lots $24.99 |
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Pink tourmaline facet cab bead mine rough-100 carat lot $9.99 |
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Chrome diopside-RARE-facet rough from Russia-10 carat $9.99 |
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Chrome diopside-RARE-facet rough from Russia-10 carat $9.99 |
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Rutilated Quartz-facet rough-black/silver/gold 1/4# $9.99 |
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Rutilated Quartz-facet rough-black/silver/gold 1/4# $9.99 |
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26.25 ct. Natural Violet Iolite Facet Rough NR! $0.99 |
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15.50 Ct. Natural Purple Amethyst Facet Rough $0.99 |
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140.40ct.Natural Green Apatite Facet Rough $9.99 |
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Peach Morganite gem facet rough from Zambia-20 cts $9.99 |
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Peach Morganite gem facet rough from Zambia-20 cts $9.99 |
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Ametrine gem facet mine rough from Bolivia-1/4# $9.99 |
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Ametrine gem facet mine rough from Bolivia-1/4# $9.99 |
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Amblygonite-facet mine rough-75 carat lot-RARE $9.99 |
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Imperial Topaz-orange facet rough crystal-20 carat lots $9.99 |
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Apatite-Gemmy Blue apatite facet rough-100 carat lots $9.99 |
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Apatite-Gemmy Blue apatite facet rough-100 carat lots $9.99 |
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Morganite gem facet rough from Zambia-25 carat lots $9.99 |
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Morganite gem facet rough from Zambia-25 carat lots $9.99 |
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Peridot-Clean clean gem facet rough-40 carat lots $9.99 |
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9.05 Ct. Natural Pink Tourmaline Facet Rough Nigeria $0.99 |
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13.95 Ct. Natural Yellow-Green Tourmaline Facet Rough $0.99 |
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20.55 Ct. Blue Zircon Facet Rough Cambodia $0.99 |
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14.85 Ct. Red Ruby Facet Rough Mozambique $0.99 |
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25.10 Ct. Natual Blue Sapphire Facet Rough Australia $0.99 |
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15.45 Ct. Natural Pink Tourmaline Facet Rough $0.99 |
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24.05Ct.Natural Violet Iolite Facet Rough $0.99 |
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30.45 Ct. Natural Fancy Spinal Facet Rough $0.99 |
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PINK CHAMPAGNE 7385 CTS CUBIC ZIRCONIA FACET ROUGH $96.99 |
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Hessonite Garnet mine rough facet cab tumble-1/2# $8.99 |
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Hessonite Garnet mine rough facet cab tumble-1/2# $8.99 |
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Hessonite Garnet mine rough facet cab tumble-1/2# $8.99 |
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29.65 Ct. NATURAL GREEN PREHNITE FACET ROUGH $0.99 |
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15.55 Ct. Natural Red Spessartite Garnet Facet Rough $0.99 |
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22.85 Ct. Natural Green Apatite Facet Rough $0.99 |
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40.25 Ct. Natural White Fluorite Facet Rough madagasca $0.99 |
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41.50 CT. Green Apatite Facet Rough Natural $0.99 |
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11.30Ct.Natural Yellow Fire Opal Facet Rough $0.99 |
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19 ct rare eye clean facet rough citrine crystal $24.00 |
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0.41 ct Uncut Facet Rough Colombian Muzo Emerald Gem $12.30 |
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CHARMING!!!! 29.99 VIOLET AMEHRYST FACET ROUGH /NATURAL $0.99 |
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48.35CT GRACEFUL LEMON QUARTZ FACET ROUGH / 1 PCS. $0.99 |
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15.65CT FOREST GREEN APATITE FACET ROUGH / UNHEATED $0.99 |
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Superb, Luscious, Very Fine Peridot Facet Rough! $38.95 |
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FABULOUS 10ct Red Oregon SUNSTONE Facet Rough Gemstone $137.00 |
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2 PC./20.1CT.NATURAL EMERALD COLOUR EMERALD FACET ROUGH $0.99 |
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40 ct rare eye clean facet rough citrine crystal $24.00 |
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BLUE 645 CARATS CUBIC ZIRCONIA FACET ROUGH $35.99 |
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0.44 ct Uncut Facet Rough Colombian Muzo Emerald Gem $13.20 |
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Exquisite,Royal Siberian Amethyst Gem Facet Rough $21.95 |
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Exquisite,Royal Siberian Amethyst Gem Facet Rough $21.95 |
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Exquisite,Royal Siberian Amethyst Gem Facet Rough $29.95 |
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Superb, Apple Green Moldavite Tektite Gem Facet Rough! $458.95 |
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Superb, Apple Green Moldavite Tektite Gem Facet Rough! $448.95 |
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Very Rare Natrolite Gem Facet Rough Crystal! $122.95 |
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Fine, Apricot Imperial Topaz Gem Facet Rough! $78.95 |
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Most Desired Rare California Axinite Gem Facet Rough! $189.95 |
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Facet Rough Watermelon Red Green Tourmaline 107cts $15.50 |
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Flawless Facet Rough Indicolite Blue Tourmaline Stick $27.00 |
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Facet Rough Watermelon Green Pink Tourmaline Stick 151c $2.39 |
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13 ct rare eye clean facet rough citrine crystal $24.00 |
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Facet Rough Pink n Green Tourmaline Stick 125cts $8.03 |
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3.28 CRT GREEN PARAIBA TOURMALINE FACET ROUGH $9.99 |
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29 ct rare eye clean facet rough citrine crystal $24.00 |
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272 Carats Ametrine Facet Rough Specimen Gemstone Gem $49.99 |
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3.07 CRT WATERMELON PARAIBA TOURMALINE FACET ROUGH $13.49 |
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4.99 CRT WATERMELON PARAIBA TOURMALINE FACET ROUGH $9.99 |
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0.41 ct Uncut Facet Rough Colombian Muzo Emerald Gem $12.30 |
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1.39 CRT WATERMELON PARAIBA TOURMALINE FACET ROUGH $13.49 |
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8 Rare Gold Yellow Sinhalite Crystal Facet Rough Mogok $5.50 |
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4.91 CARAT STUNNING RED SAPPHIRE FACET ROUGH $9.99 |
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15.80 Ct. Natural Red Ruby Facet Rough $0.99 |
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20.80 ct. Natural Green Apatite Facet Rough $0.99 |
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Two Sky Blue White Larimar Pectolite Gemstones Cabbing Raw Uncut Rough Chunk Volcano Pretty Gorgeous Lapidary Gemstones Cabs Rough Larimars $9.99 Gorgeous chunks of more square but some rectrangular shaped blue and white patterned Larimar cabbing rough - bottom picture is not the same stone but shows an example one of these stones soaked in water for a long time to get an idea how the stone listed can be when polished (the blue parts of the dry should turn more blue , possibly not as blue , for all the stones in the purchased rough lot) - N... |
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Garnets MALAYA raw uncut jewel facet gem rough Wine Red MALAIA garnet Top Premium Facet Rough Gems Garnets Large big jewelry grade nice top Rosy Red MALAIA GARNET faceting rough Raw uncut lapidary jewel Carat Weight:43.45 carats ct or around 8.69 grams gr Quantity:one Size:20 x 13.40 x 12.70mm - seemm ruler below Shape:a bit odd rectangular blocky shaped Color:Dark Wine Rose Red Clarity Quality:Looks like it may be Eye clean VVS VS or could have slight inclusions Co... |
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20 Carats Anthill Ruby Red Chrome Pyrope Garnet Gem Stones Facet Rough Gems 1 to 2 Ct Jewels Beauty Faceters Facet Rough Gems Garnets Ravishing Facet rough rich Ruby Red Chrome Pyrope Garnet ~ Just beautiful ! - The name comes from ants " mining / collecting " these garnets and found near anthills - One of the finest intense deep hot red stones and a great collector stone - Chrome refers to the coloring element Chromium which is what makes some gemstones a much more rich color and more valuable - around 16 to 20 stones per parce... |
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Rough surface scattering based on facet model (RSL technical report) ... |
