Riker Brothers sapphire and diamond cluster ring, American, circa 1920. Hatton garden1

Riker Brothers sapphire and diamond cluster ring, American, circa 1920. Hatton garden2

Riker Brothers sapphire and diamond cluster ring, American, circa 1920. Hatton garden3

Riker Brothers sapphire and diamond cluster ring, American, circa 1920. Hatton garden4

Riker Brothers sapphire and diamond cluster ring, American, circa 1920. Hatton garden5

Riker Brothers sapphire and diamond cluster ring, American, circa 1920. Hatton garden6

Riker Brothers sapphire and diamond cluster ring, American, circa 1920. Hatton garden7

Riker Brothers sapphire and diamond cluster ring, American, circa 1920.

Platinum, Diamond, Sapphire

£9,300

and ring. Centrally set with a diamond-shape step-cut unenhanced sapphire in an setting with an approximate weight of 0.90 , further set with twenty round in open back and rubover settings with an approximate combined weight of 0.70 carats, to a geometric cluster design featuring intricate openwork with edging, a decoratively pierced and fancy shape open backholing, leading to openwork with a scrolling motif and flowing through to a ribbed flat . , for Riker Brothers, American, 1920, accompanied by Gemmological Certification Services report #5784-3687.

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Reference Number 16745

Maker Riker Brothers

Origin America

Ring size: J½

Size Guide

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

Period 1920's

TOTAL / RING Weight 5.5 grams

Metal Platinum

Gemstone Basaltic Unheated Sapphire, Step Cut, approximately 0.9ct 20 x Diamonds, Old Cut, approximately 0.7ct total

Condition

The ring is in excellent condition.

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

Riker Brothers sapphire and diamond cluster ring, American, circa 1920.

Platinum, Diamond, Sapphire

£9,300

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