Depending on the context, 1ct tw could mean one carat total weight, and 1ct TDW could mean one carat total diamond weight.
Without a context, it's difficult to give you a better answer.
TDW stands for TOTAL DIAMOND WEIGHT
TDW diamond refers to "total diamond weight" and it is used for pieces of jewelry that contain more than one diamond. Each diamond has its own weight and when they are all weighted together, it is called total diamond weight.
The phrase indicates that the total weight of all the diamonds in the jewelery weigh 15/100ths of one carat.
TW stands for the total weight of all the diamonds, expressed in carats.
It's a ring with a 1.5 carat diamond, the numbers indicate size. 1ct is already a very large diamond for a ring.
TDW stands for TOTAL DIAMOND WEIGHT
As of July 2014, the market cap for Tidewater Inc. (TDW) is $2,464,554,868.46.
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The symbol for Tidewater Inc. in the NYSE is: TDW.
The airport code for Tradewind Airport is TDW.
The main difference between the internet domain suffix TW and the domain suffix US is geographical location. TW is the domain suffix used for websites in Taiwan, and the US domain suffix is used for websites in the United States.
If you think to carat this has 200 mg and is not a SI unit.The volume depends on the density of the material (V=G/d).
Its depend on size, shape and colors normally the price of gemstone is $20-500 for more details you can try this Cabochonsforsale.
TDW diamond refers to "total diamond weight" and it is used for pieces of jewelry that contain more than one diamond. Each diamond has its own weight and when they are all weighted together, it is called total diamond weight.
'TDW diamonds' indicates that the diamond stones have a total diamond weight of some number of carats, with each diamond having an individual weight that contributes to the total.In order to be included in a total diamond weight calculation, the stone must be a real diamond.
TRAL-WAY
Tw telecom's population is 2,010.