Troy Pounds
An apothecary weight equal to 12 ounces or 373.242 grams
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An apothecary weight equal to 12 ounces or 373.242 grams
Abbreviated "ct." and spelled with a "c" is a measure of weight used for gemstones. One carat is equal to 1/5 of a gram (200 milligrams). Stones are measured to the nearest hundredth of a carat. A hundreth of a carat is also called a point. Thus a .10 carat stone can be called either 10 points, or 1/10 of a carat. Small stones like .05, and .10ct are most often referred to by point designations. Note that karat with a "K" is a measure of the purity of a gold alloy. A one carat round diamond of average proportions is approximately 6.5mm in diameter. Note that this relationship of weight and size is different for each family of stones. For example ruby and sapphire are both heavier than diamond (technically, they have a higher specific gravity, so a 1 carat ruby or sapphire is smaller in size than a on carat diamond. See Weights and Measures of Gold, Silver and Precious Gems for more information.
Troy Pounds | Carats |
---|---|
0t lb | 0.00ct |
1t lb | 1866.21ct |
2t lb | 3732.42ct |
3t lb | 5598.63ct |
4t lb | 7464.83ct |
5t lb | 9331.04ct |
6t lb | 11197.25ct |
7t lb | 13063.46ct |
8t lb | 14929.67ct |
9t lb | 16795.88ct |
10t lb | 18662.09ct |
11t lb | 20528.29ct |
12t lb | 22394.50ct |
13t lb | 24260.71ct |
14t lb | 26126.92ct |
15t lb | 27993.13ct |
16t lb | 29859.34ct |
17t lb | 31725.55ct |
18t lb | 33591.75ct |
19t lb | 35457.96ct |
Troy Pounds | Carats |
---|---|
20t lb | 37324.17ct |
21t lb | 39190.38ct |
22t lb | 41056.59ct |
23t lb | 42922.80ct |
24t lb | 44789.01ct |
25t lb | 46655.21ct |
26t lb | 48521.42ct |
27t lb | 50387.63ct |
28t lb | 52253.84ct |
29t lb | 54120.05ct |
30t lb | 55986.26ct |
31t lb | 57852.47ct |
32t lb | 59718.68ct |
33t lb | 61584.88ct |
34t lb | 63451.09ct |
35t lb | 65317.30ct |
36t lb | 67183.51ct |
37t lb | 69049.72ct |
38t lb | 70915.93ct |
39t lb | 72782.14ct |
Troy Pounds | Carats |
---|---|
40t lb | 74648.34ct |
41t lb | 76514.55ct |
42t lb | 78380.76ct |
43t lb | 80246.97ct |
44t lb | 82113.18ct |
45t lb | 83979.39ct |
46t lb | 85845.60ct |
47t lb | 87711.80ct |
48t lb | 89578.01ct |
49t lb | 91444.22ct |
50t lb | 93310.43ct |
51t lb | 95176.64ct |
52t lb | 97042.85ct |
53t lb | 98909.06ct |
54t lb | 100775.26ct |
55t lb | 102641.47ct |
56t lb | 104507.68ct |
57t lb | 106373.89ct |
58t lb | 108240.10ct |
59t lb | 110106.31ct |