Art Deco black opal and diamond ring, circa 1920 hatton garden1

Art Deco black opal and diamond ring, circa 1920 hatton garden2

Art Deco black opal and diamond ring, circa 1920 hatton garden3

Art Deco black opal and diamond ring, circa 1920 hatton garden4

Art Deco black opal and diamond ring, circa 1920 hatton garden5

Art Deco black opal and diamond ring, circa 1920 hatton garden6

Art Deco black opal and diamond ring, circa 1920.

Platinum, Diamond, Opal

£25,000

black and ring. Set to centre with an oval black opal in an setting with an approximate weight of 2.75 , further decorated with thirty round eight-cut in open back settings with a combined approximate weight of 0.60 carats, to an impressive flank design featuring polished edges, a decorative with motifs, and fancy shape open backholing, leading to raised stepped , and flowing through to a solid . , 1920.

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Reference Number 27852

Ring size: K½

Size Guide

The majority of items can be re-sized free of charge.

Period Art Deco

TOTAL / RING Weight 6.3 grams

Metal Platinum

Gemstone Opal, Cabochon, approximately 2.75ct 30 x Diamonds, Eight Cut, approximately 0.6ct total

Condition

This ring is in excellent condition.

Chairman's Notes

Black opals were formed approximately 60 million years ago when silica rich water was carried into cracks and voids within the earth. As the water evaporated, it left behind a silica deposit, which has created the beautiful opals that we know today. The colours visible in the play-of-colour of an opal depends on the structure of the gem, and depending on which angle the light hits the opal, it is diffracted differently due to the complexity of the structure, creating this fleeting, almost mystical, effect. Black opals are considered to be the rarest and most beautiful of the opals, and the 'play of colour' contrasts beautifully against a dark body colour.

Delivery & Returns

Inside diameter (mm)	USA	UK	China India	European
11.63	0
11.84	¼
12.04	½	A
12.24	¾	A½
12.45	1	B	1
12.65	1¼	B½
12.85	1½	C
13.06	1¾	C½		41
13.26	2	D	2	42
13.46	2¼	D½
13.67	2½	E	3	43
13.87	2¾	E½
14.07	3	F	4	44
14.27	3¼	F½	5	45
14.48	3½	G
14.68	3¾	G½	6	46
		H		47
14.88	4	H½	7
15.09	4¼	I		48
15.29	4½	I½	8
15.49	4¾	J		49
15.7	5	J½	9	50
15.9	5¼	K		51
16.1	5½	K½	10
16.31	5¾	L		52
16.51	6	L½	11
16.71	6¼	M	12	53
16.92	6½	M½	13
17.12	6¾	N		54
17.32	7	O	14	55
17.53	7¼	O½		56
17.73	7½	P	15
17.93	7¾	P½		57
18.14	8	Q	16
18.34	8¼	Q½		58
18.54	8½	R	17	59
18.75	8¾	R½
18.95	9	S	18	60
19.15	9¼
19.35	9½	S½	19	61
19.56	9¾	T
19.76	10	T½	20	62
19.96	10¼	U	21
20.17	10½	U½	22	63
20.37	10¾	V		64
20.57	11	V½	23
20.78	11¼	W		65
20.98	11½	W½	24
21.18	11¾	X		66
21.39	12	Y	25	67
21.59	12¼	Y½		68
21.79	12½	Z	26
22	12¾	Z½		69
22.2	13		27
22.4	13¼
22.61	13½
22.81	13¾
23.01	14
23.22	14¼
23.42	14½
23.62	14¾
23.83	15
24.03	15¼
24.23	15½
24.43	15¾
24.64	16

Next day delivery Tuesday to Saturday before 1pm – order by 4:30pm	Complimentary
Nominated day delivery Tuesday to Saturday	Complimentary
Same Day Delivery within London Monday to Saturday – order by 3:30pm	£100

USA 7-10 business days - complimentary fully insured shipping	Complimentary
Europe and Rest of World 7-10 business days - complimentary fully insured shipping	Complimentary

Art Deco black opal and diamond ring, circa 1920.

Platinum, Diamond, Opal

£25,000

About the Gemstone

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