French Art Deco Sapphire and Diamond Safety Pin Brooch, c.1920

DESCRIPTION

This French Art Deco brooch reimagines the humble safety pin as a refined piece of sculptural jewelry. Measuring an impressive 7.7 cm in length, it far exceeds the scale of an ordinary pin—its exaggerated proportions and bold silhouette transform a utilitarian object into a striking statement piece.

Set with certified natural sapphires and brilliant old-cut diamonds, the brooch exemplifies the clean lines and geometric precision characteristic of the Art Deco period. The sapphires are cut in the calibré-cut style—a meticulous technique developed during the era, in which each stone is custom-cut to fit perfectly into the design. This seamless, close-set arrangement creates a mosaic-like effect and reflects a high level of craftsmanship rarely seen in modern jewelry.

Created at a time when synthetic gemstone techniques were first entering the market, this piece stands apart for its use of natural, tested stones—highlighting both material integrity and artisanal excellence.

The brooch is in very good antique condition, with minimal signs of wear. As condition is subjective, please view the photos as part of the description.
 

ORIGIN
France
ERA
1920s
MATERIAL
18k solid gold, platinum
STONE
natural sapphire, diamond (tested)
SIZE
7.7x0.3x0.8 cm
WEIGHT
6.41g
CONDITION
very good antique condition, with minimal signs of wear
US$1642.66

RING SIZE CHART

戒圍參照表

US
Size
Inside
Diameter (mm)
Inside
Circumference (mm)
0.5 12.04 37.8
0.75 12.24 38.5
1 12.45 39.1
1.25 12.65 39.7
1.5 12.85 40.4
1.75 13.05 41
2 13.26 41.7
2.25 13.46 42.3
2.5 13.67 42.9
2.75 13.87 43.6
3 14.07 44.2
3.25 14.27 44.8
3.5 14.48 45.5
3.75 14.68 46.1
4 14.88 46.8
4.25 15.09 47.4
4.5 15.29 48
4.75 15.49 48.7
5 15.7 49.3
5.25 15.9 50
5.5 16.1 50.6
5.75 16.31 51.2
6 16.51 51.9
6.25 16.71 52.5
6.5 16.92 53.1
6.75 17.12 53.8
7 17.32 54.4
7.25 17.53 55.1
7.5 17.73 55.7
7.75 17.93 56.3
8 18.14 57
8.25 18.34 57.6
8.5 18.54 58.3
8.75 18.75 58.9
9 18.95 59.5
9.25 19.15 60.2
9.5 19.35 60.8
9.75 19.56 61.4
10 19.76 62.1
10.25 19.96 62.7
10.5 20.17 63.4
10.75 20.37 64
11 20.57 64.6
11.25 20.78 65.3
11.5 20.98 65.9
11.75 21.18 66.6
12 21.39 67.2
12.25 21.59 67.8
12.5 21.79 68.5

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國際圍 內直徑 (mm) 周長 (mm)
2 12 37.7
3 12.5 39.27
4 13 40.84
5 13.5 42.41
6 14 43.98
7 14.5 45.55
8 15 47.12
9 15.5 48.69
10 16 50.27
11 16.5 51.84
12 17 53.41
13 17.5 54.98
14 18 56.55
15 18.5 58.12
16 19 59.69
17 19.5 61.26
18 20 62.83
19 20.5 64.4
20 21 65.97
21 21.5 67.54

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