确定阿拉伯珠宝中黄金的克拉数（请原谅我把手指弄圆了）

https://preview.redd.it/n1yr28wng1kd1.jpg?width=3024&format=pjpg&auto=webp&s=d84cb1752ca18361ebbdd1b5d4eae0f588960089

https://preview.redd.it/ragx58xng1kd1.jpg?width=3024&format=pjpg&auto=webp&s=b60898157fab9162fd528d4f06804fde6e871127

https://preview.redd.it/puhr25xng1kd1.jpg?width=3024&format=pjpg&auto=webp&s=bbba931400253b2bb3166d4bd96f9e6997db0485

https://preview.redd.it/55ui24xng1kd1.jpg?width=3024&format=pjpg&auto=webp&s=40589c1d5ae71352d9fd3066640e0c5fa01319ef