carat
carat — 名詞
- caratsingular
- caratsplural
1. a standard weight used in the jewellery trade for precious stones. A single cara
克拉
寶石重量單位（1克拉=200毫克）
a standard weight used in the jewellery trade for precious stones. A single carat weighs exactly 200 milligrams — about the same weight as a small paperclip. Jewellers use this unit when describing diamonds, rubies, and other gems.
Wei bought his fiancée a diamond ring that weighed two carats.
Wei 買了一枚兩克拉的鑽戒送給未婚妻。
number + carats as weight measurement
The museum displayed a dark-red ruby of nearly ten carats inside a glass case.
博物館在玻璃櫃中展示了一顆將近十克拉的深紅寶石。
"How many carats is that emerald?" the jeweller asked, holding it up to the light.
「這顆祖母綠有幾克拉？」珠寶商邊問邊把它舉到燈光下。
A one-carat sapphire is much smaller than most people imagine before seeing one in person.
一克拉的藍寶石實際上看起來比多數人想像中還要小。
The necklace had small pearls and a three-carat diamond at the centre.
那條項鍊綴有小珍珠，中央鑲著一顆三克拉的鑽石。
- point
a point is 0.01 carats; used for small gem weights only ('a 50-point diamond' = 0.5 carats)
文法句型
number + carat + noun (as modifier)
weigh + number + carats
用法筆記
Abbreviated as 'ct' in writing ('a 2 ct diamond'). Use a hyphen when the number and 'carat' appear before a noun: 'a one-carat stone'.
常見錯誤
2. a measurement on a scale from 1 to 24 that tells you what share of a metal blend
K金純度
黃金純度單位（24K為純金）
a measurement on a scale from 1 to 24 that tells you what share of a metal blend is actually pure gold. Gold marked 24 carats is completely pure, while lower numbers indicate that other metals have been added to make the alloy stronger or cheaper.
Amina chose an 18-carat gold bracelet since 24-carat gold is too soft for daily wear.
Amina 選了一條 18K 金手鍊，因為純 24K 金太軟，不適合日常佩戴。
comparison: 18-carat vs 24-carat gold
The stamp inside the ring said "750", which confirms it is 18-carat gold.
戒指內側刻著「750」字樣，表示這是 18K 金。
Diego inherited a set of 22-carat gold coins his grandfather collected over forty years.
Diego 繼承了一批 22K 金幣，是他祖父花了四十多年收集的。
Ingrid prefers 9-carat gold for earrings because it is harder and cheaper than high-purity gold.
Ingrid 日常戴的耳環偏好 9K 金，因為硬度較高且價格比高純度金飾便宜。
The jeweller said 14-carat gold contains fourteen parts pure gold and ten parts other metals.
珠寶商說，14K 金含有十四份純金與十份其他金屬。
- karat
American spelling variant, used exclusively for gold purity; abbreviated as 'k' (e.g. '18k ring')
文法句型
number + -carat + gold (as modifier)
用法筆記
In American English, purity is usually spelled 'karat' (abbreviated 'k' or 'K'), while gem weight is 'carat' (abbreviated 'ct'). The standard appears after the number: '18K gold', '24K gold'. UK English uses 'carat' for both senses.