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#259825 - 08/03/06 06:28 AM Colored Stone Weight Estimation Table
BlueDiamond BlueDiamond Omniscient Registered: 03/30/05 Posts: 3241	Colored Gems Weight Estimation Tables To obtain approximate weights of the following shapes of colored stones multiply by the following measurements to millimeters. A listing of the specific gravities is below. Round Faceted = ...................Diameter x diameter x depth x SG x .0018 Oval Faceted = .......................Diameter x diameter x depth x SG x .0020 Emerald Faceted = .................Length x width x depth x SG x .0025 Rectangle Faceted = .............Length x width x depth x SG x .0026 Square Faceted = ...................Length x width x depth x SG x .0025 Marquise Faceted = ...............Length x width x depth x SG x .0017 Pear Faceted = ........................Length x width x depth x SG x .0018 Heart Faceted = ......................Length x width x depth x SG x .0018 Table of Specific Gravities for Popular Gemstones Zircon: ........4.32 - 4.70 Diamond: ................3.52 Conch Pearl: ............2.85 Almandite Garnet: 4.05 Peridot: ....................3.34 Turquoise: .................2.76 Ruby: ......................4.00 Jadeite: .....................3.34 Lapis Lazuli: .............2.75 Sapphire: ................4.00 Zoisite (tanzanite) ..3.35 Beryl Group: ............2.72 Malachite: ..............3.95 Diopside: .................3.29 Pearl: ..........................2.70 Rhodolite Garnet: 3.84 Spodumene: ............3.18 Quartz: .......................2.66 Pyrope Garnet: .....3.78 Andalusite: ...............3.17 Coral: .........................2.65 Chrysoberyl: .........3.73 Tourmaline: .............3.06 Iolite: ..........................2.61 Spinel: ....................3.60 Nephrite: ..................2.95 Opal: ..........................2.15 Source: http://www.yourgemologist.com/Charts%20and%20Graphs/coloredgemweights.html Note: you can incorporate the constants in the diamond estimation table for emerald, pear and marquise to get a better estimate for those here _________________________ ========================================== "Stop taking financial advice from broke people."
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#259826 - 08/03/06 08:33 AM Re: Colored Stone Weight Estimation Table [Re: BlueDiamond]
spynena007 spynena007 BTD Crown Jewel Registered: 05/02/03 Posts: 12353 Loc: New York, NY	The x times the thing a ma jig multiplied by... gosh this stuff is hard math was never my strong suit SPY _________________________
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#259827 - 08/03/06 08:36 AM Re: Colored Stone Weight Estimation Table [Re: spynena007]
CaraMish CaraMish The Centenary Diamond Registered: 11/13/04 Posts: 8021 Loc: Alabama	BlueDiamond, if I were a guy I believe I would ask you to marry me...I'm a closeted science nerd... _________________________
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#259828 - 08/03/06 10:34 AM Re: Colored Stone Weight Estimation Table [Re: spynena007]
BlueDiamond BlueDiamond Omniscient Registered: 03/30/05 Posts: 3241	Quote: The x times the thing a ma jig multiplied by... gosh this stuff is hard math was never my strong suit SPY Now, now, now. Don't get excited . . . it's only arithmetic! Let me know if you need extra help! LOL! _________________________ ========================================== "Stop taking financial advice from broke people."
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#259829 - 08/03/06 10:34 AM Re: Colored Stone Weight Estimation Table [Re: CaraMish]
BlueDiamond BlueDiamond Omniscient Registered: 03/30/05 Posts: 3241	Quote: BlueDiamond, if I were a guy I believe I would ask you to marry me...I'm a closeted science nerd... _________________________ ========================================== "Stop taking financial advice from broke people."
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#259830 - 08/03/06 11:52 AM Re: Colored Stone Weight Estimation Table [Re: spynena007]
CaraMish CaraMish The Centenary Diamond Registered: 11/13/04 Posts: 8021 Loc: Alabama	Quote: The x times the thing a ma jig multiplied by... gosh this stuff is hard math was never my strong suit SPY She's just playing dumb folks...this lady's very likely a Mensa member... _________________________
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#259831 - 08/03/06 12:09 PM Re: Colored Stone Weight Estimation Table [Re: CaraMish]
BlueDiamond BlueDiamond Omniscient Registered: 03/30/05 Posts: 3241	Quote: Quote: The x times the thing a ma jig multiplied by... gosh this stuff is hard math was never my strong suit SPY She's just playing dumb folks...this lady's very likely a Mensa member... To be sure!!! _________________________ ========================================== "Stop taking financial advice from broke people."
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#259832 - 08/03/06 02:09 PM Re: Colored Stone Weight Estimation Table [Re: BlueDiamond]
DiamondLil DiamondLil Mentor Registered: 06/12/04 Posts: 920 Loc: MA	Isn't it easier to just weigh them on one of those little scales? _________________________ DiamondLil
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#259833 - 08/03/06 02:31 PM Re: Colored Stone Weight Estimation Table [Re: DiamondLil]
BlueDiamond BlueDiamond Omniscient Registered: 03/30/05 Posts: 3241	Quote: Isn't it easier to just weigh them on one of those little scales? It is if you have an appropriate scale, and the stone is unset and you are interested in the weight of the stone, itself, instead of an equivalent [eg CZ to diamond, CZ to sapphire, etc.] in which case you'd have to take the ratio of the specific gravities and then apply it to estimate the weight of the stone you are trying to mimic after you weigh the one you have. _________________________ ========================================== "Stop taking financial advice from broke people."
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#259834 - 09/25/06 08:30 PM Re: Colored Stone Weight Estimation Table [Re: BlueDiamond]
gemselect gemselect Curious Registered: 08/31/06 Posts: 1	For those (like me) who are too lazy to do the arithmetic, this chart of all the calibrated sizes for the standard gem shapes might be helpful -- it shows the weights for each gemtype by size and shape: calibrated size chart Happy gem hunting Ron Nash GemSelect Chanthaburi
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