Colombian emerald and diamond bar brooch, circa 1920. 1

Colombian emerald and diamond bar brooch, circa 1920. 2

Colombian emerald and diamond bar brooch, circa 1920. 3

Colombian emerald and diamond bar brooch, circa 1920. 4

Colombian emerald and diamond bar brooch, circa 1920.

Platinum, Diamond, Emerald

£72,000

and bar . Set to centre with an octagonal-emerald cut Colombian emerald with insignificant oil and rare 'gota de aceite' effect, in an setting with an approximate weight of 1.90 , flanked by two shape in open back rubover settings with a combined approximate weight of 1.65 carats, and further set with ten round diamonds in open back settings with a combined weight of 1.75 carats, terminating in two shape old cut diamonds in open back grain settings with a combined weight of 0.50 carats and four round diamonds in open back grain settings with a combined weight of 0.04 carats. The total approximate diamond weight is 3.94 carats, to an exceptional bar brooch featuring edging, a pierced linear and fancy shape open backholing, fitted to reverse with a secure pin and barrel safety clasp, approximately 7.3cm in length. , clasp , French import mark, 1920, accompanied by Laboratoire Gemmologique de Paris report #20231977052 and fitted box.

Purchase

Call us

Enquire

Viewing

Reference Number 29587

Period Art Deco

TOTAL / RING Weight 7.14 grams

Metal Platinum

Gemstone Colombian No Oil Emerald, Emerald Cut, approximately 1.9ct 2 x Diamonds, Old Mine, approximately 1.65ct total 10 x Diamonds, Old Cut, approximately 1.75ct total 2 x Diamonds, Drop Shape, approximately 0.5ct total 4 x Diamonds, Rose Cut, approximately 0.04ct total

Condition

This brooch is in excellent condition.

Chairman's Notes

The most prized phenomenon that can be seen in a Colombian emerald is known as 'gota de aceite' ('drop of oil' in Spanish), or 'butterfly wings'. Microscopic inclusions, caused by growth irregularities within the crystal, act to scatter the light, spreading the colour and reducing extinction within the stone.

'Gota de aceite' produces a beautiful velvety texture within the emerald, often described as having the appearance of roiled oil or honey. This is highly desirable, and comparable to the velvety appearance of a Kashmir sapphire.

Exceptionally rare, this phenomenon is seen in only the very finest of Colombian emeralds, further adding to their allure, and value.

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

Colombian emerald and diamond bar brooch. Set to centre with an octagonal-emerald cut natural Colombian emerald with insignificant oil and rare 'gota de aceite' effect, in an open back rubover setting with an approximate weight of 1.90 carats, flanked by two cushion shape old mine diamonds in open back rubover settings with a combined approximate weight of 1.65 carats, and further set with ten round old cut diamonds in open back grain settings with a combined weight of 1.75 carats, terminating in two drop shape old cut diamonds in open back grain settings with a combined weight of 0.50 carats and four round rose cut diamonds in open back grain settings with a combined weight of 0.04 carats. The total approximate diamond weight is 3.94 carats, to an exceptional bar brooch featuring millegrain edging, a pierced linear gallery and fancy shape open backholing, fitted to reverse with a secure pin and barrel safety clasp, approximately 7.3cm in length. Marked platinum, clasp tested white gold, French import mark, circa 1920, accompanied by Laboratoire Gemmologique de Paris report #20231977052 and fitted box.

29587

green

Platinum

https://www.berganza.com/images/jewellery/jewelleryitemphoto_22692_9.jpg

InStock

GBP

72000.00

UsedCondition

https://www.berganza.com/shop/brooches/colombian-emerald-and-diamond-bar-brooch-circa-1920

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

Colombian emerald and diamond bar brooch, circa 1920.

Platinum, Diamond, Emerald

£72,000

About the Gemstone

You may also like