The seeds are said interest in chemistry - in other words, pupils to be the original carat weights used by gold(or their parents), students, professionals on smiths.
The only general exception is the exemption of 9 and 14 carat gold.
I can confirm that this would include articles of 10 carat gold.
In 1964 its output of synthetic diamonds was 4 million carats; in 1968, it had risen to 11 million carats.
In these groups of amendments we have also catered for the term "carat".
Further, gold articles were to be 19 and one-fifth carats.
We feel that it would be wrong to drop altogether the very well-known and accepted word "carat".
I will say a word about the standard for 22 carat gold.
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克拉,卡(寶石的重量單位), 開(黃金的純度單位)…
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克拉(宝石的重量单位), 开(黄金的纯度单位)…
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quilate…
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karat, mücevherat değer birimi…
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