鑽石4C標準的起源鑽石4C於1953年發明，即是重量(Carat Weight)、淨度(Clarity)、成色(Color)及切工(Cut)等4個要素評定鑽石等級，此鑽石等級分級系統有效的分別鑽石等級評定。直至今日這個4C鑽石等級分級系統已成為全球珠寶市場中業者及消費者的共通語言。這個鑽石等級分級系統也因GIA美國寶石學院鑑定中心嚴格執行，使得GIA的鑽石鑑定證書成為全世界鑽石交易的標準。
延伸閱讀：
●鑽石分級基礎 - 4C中的重量(Carat Weight)
●鑽石分級基礎 - 4C中的切工(Cut)
●鑽石分級基礎 - 4C中的淨度(Clarity)
●鑽石分級基礎 - 4C中的成色(Color)
轉載自《GIA 4C官方網站》
They also combine a reside on line casino right here, which is powered by Betsoft. Other video games embrace Keno and a number of|various|a variety of} other|and quantity of} other} video poker variants. Spin Casino's gamers can get pleasure from instant access to the entire video games may be} offered. With complete compatibility, this website attracts tons of of loyal members and it consistently has top evaluations. One of 블랙잭 the good things about being a member of Spin Casino is the providing of loyalty rewards. When we reviewed this program, we discovered that you will immediately turn out to be a member of the loyalty program and can start incomes points as you wager on video games.
回覆刪除