News – Tagged "diamonds"

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Lab-grown diamonds are chemically and optically identical to mined diamonds—same sparkle, same hardness, different or...

21 May 2026 1 min read

USA & Canada	Diameter (mm)	Europe	UK & Australia
3	14.1	44	F
3.5	14.5	45.5	G
4	14.9	47	H
4.5	15.3	48	I
5	15.7	49	J½
5.5	16.1	50.5	K½
6	16.5	52	L½
6.5	16.9	53	M½
7	17.3	54.5	N½
7.5	17.8	56	O½
8	18.2	57	P½
8.5	18.6	58.5	Q½
9	19	60	R½
9.5	19.4	61	S½
10	19.8	62	T½
10.5	20.2	63.5	U½
11	20.6	65	V½
11.5	21.1	66	W½
12	21.5	67.5	X½
12.5	21.9	69	Z
13	22.3	70