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Koller offers a fine selection of coloured precious stones, diamonds, natural pearls and jewellery from all periods, mainly from private collections. Our four annual jewellery auctions offer a wide range of vintage and signed pieces at all price levels.

Some of the well-known makers which are always present in our auctions are Boucheron, Bulgari, Cartier, Harry Winston, JAR, Mauboussin, Tiffany & Co., Van Cleef & Arpels, and Webb.

Jewellery has always been considered desirable to own and wear as well as a solid investment, and this is true today more than ever. Our specialists examine and estimate your jewellery from a historical and aesthetic perspective, analyse its value on the current market, considering factors such as its provenance and collectability. Our long experience and intimate knowledge of the market are our guarantee of a professional evaluation of your jewellery as well as the successful handling of its sale. The numerous visitors to our previews in Zurich, Geneva and Germany, combined with our international network of collectors and professionals, assure worldwide interest and exceptional auction results.

Our jewellery specialists are available to estimate single items or entire collections for our upcoming auctions.

Consignments are accepted until mid-January for our April auctions, late March for our June auctions, late June for our October sales, and late September for our December auctions.

UPCOMING AUCTIONS


ibid online only: 1 April 2025, catalogue online 18 March

25 June 2025. Would you like to sell jewellery in our June 2025 auction? Contact us by mid-April for a no-obligations valuation.

26 November 2025. Consignment deadline (ZRH): late September

Valuations / Consignments


Jewellery specialist at Koller examining a gemstone

If you wish to consign to one of our auctions, we will value your artworks free of charge. Please send us photos if possible, or call us. We will arrange an appointment to view your property at your home or in one of our offices in Zurich, Geneva, Florence, Munich or Düsseldorf. You will then receive our auction estimates so that you can make your decision.

Get an estimate now
How to sell at auction
Contact us
Contact your local representative

Valuation Events


Munich

8 & 9 February / 12 & 13 September

Frankfurt

16 February

Hamburg

22 February / 11 September

Lugano

2 February / 5 July


To make an appointment with our specialists, please contact the department or your local representative.



Representatives


Koller Geneva

Cyril Himmer
geneva@kollerauctions.com
+41 22 311 03 85

Koller Munich

Fiona Seidler
muenchen@kollerauctions.com
+49 89 22 802 766

Koller Düsseldorf

Ulrike Gruben
duesseldorf@kollerauctions.com
+49 211 30 14 36 38

Koller Italy

Lapo Bacarelli
italia@kollerauctions.com
+39 366 994 1836

Koller China

Jing Li
beijing@kollerauctions.com
+86 135 2039 8057

SELECTED RESULTS Jewellery


CEYLON SAPPHIRE AND DIAMOND EAR PENDANTS, ca. 1880.

Red gold and silver, 4g.
Each set with 1 cushion-shaped sapphire, Ceylon, not heated, of ca. 5.07 ct resp. ca. 5.12 ct, decorated with circular-cut diamonds weighing ca. 0.20 ct. L ca. 1.8 cm.
CEYLON SAPPHIRE AND DIAMOND EAR PENDANTS, ca. 1880.
CEYLON SAPPHIRE AND DIAMOND EAR PENDANTS, ca. 1880.

CHF 32 500

NATURAL PEARL NECKLACE, ca. 1900.

Clasp platinum, 59g.
Three graduated strands of 245 slightly cream-coloured natural pearls of 4 - 8.3 mm Ø, joined by an oval fermoir set with 2 circular-cut diamonds totalling ca. 1.30 ct and surrounded by circular- and single-cut diamonds. L ca. 41.5 cm.
NATURAL PEARL NECKLACE, ca. 1900.
NATURAL PEARL NECKLACE, ca. 1900.

CHF 175 000

DIAMOND AND GOLD NECKLACE WITH ASSORTED EARCLIPS.

Rose gold 750, 161g.
Model Serpenti. Tubogas necklace, designed as a stylised snake, the head and the tip of the tail set with brilliant-cut diamonds totalling ca. 5.00 ct. Signed Bulgari. L adjustable. Ensuite assorted earclips, not signed, decorated with brilliant-cut diamonds totalling ca. 6.00 ct. Ca. 3.2 x 1.9 cm.
DIAMOND AND GOLD NECKLACE WITH ASSORTED EARCLIPS.
DIAMOND AND GOLD NECKLACE WITH ASSORTED EARCLIPS.

CHF 58 750

DIAMOND AND GOLD EARCLIPS, VAN CLEEF & ARPELS, Paris.

Yellow gold 750, 14g.
Designed as hoop earclips, each set with white and yellow brilliant-cut diamonds totalling ca. 3.50 ct. Signed Van Cleef & Arpels, no. M35072. Ca. 2.4 x 1.3 cm.
DIAMOND AND GOLD EARCLIPS, VAN CLEEF & ARPELS, Paris.
DIAMOND AND GOLD EARCLIPS, VAN CLEEF & ARPELS, Paris.

CHF 31 250

DIAMOND BROOCH, CARTIER, ca. 1960.

Yellow gold 750, 12g.
Model Lovebirds. Designed as a pair of perched parrots, pavé-set with yellow and white brilliant-cut diamonds totalling ca. 2.20 ct, sitting on an onyx branch, signed Cartier, no. 635097Z. L ca. 3.8 cm.
DIAMOND BROOCH, CARTIER, ca. 1960.
DIAMOND BROOCH, CARTIER, ca. 1960.

CHF 32 500

BURMA RUBY AND DIAMOND RING.

Platinum 950 and 800, 9g.
Set with 1 cushion-shaped ruby of 4.19 ct, Burma, unheated, flanked by 6 pear-shaped diamonds weighing ca. 2.00 ct. Size ca. 51.
BURMA RUBY AND DIAMOND RING.
BURMA RUBY AND DIAMOND RING.

CHF 187 500

LOT OF 9 LOOSE CEYLON/MADAGASCAR SAPPHIRES.

Lot of 9 loose sapphires. 1 cushion-shaped sapphire of 28.70 ct, Ceylon, unheated. 1 cushion-shaped sapphire of 10.79 ct, Ceylon/Madagascar, unheated. 1 oval sapphire of 9.78 ct, Ceylon, unheated. 1 oval sapphire of 7.52 ct, Ceylon, unheated. 1 oval sapphire of 6.06 ct, Ceylon, unheated. 1 oval sapphire of 5.68 ct, Ceylon, treatment unclear. 1 roundish sapphire of 5.56 ct, Ceylon, unheated. 1 cushion-shaped sapphire of 4.91 ct, Ceylon/Madagascar, unheated. 1 oval sapphire of 3.86 ct, Ceylon/Madagascar, unheated.
LOT OF 9 LOOSE CEYLON/MADAGASCAR SAPPHIRES.
LOT OF 9 LOOSE CEYLON/MADAGASCAR SAPPHIRES.

CHF 225 000

LOOSE FANCY INTENSE PURPLISH PINK DIAMOND.

Loose diamond of 1.21 ct, Cut-Cornered Square Modified Brilliant, Fancy Intense Purplish Pink.
LOOSE FANCY INTENSE PURPLISH PINK DIAMOND.
LOOSE FANCY INTENSE PURPLISH PINK DIAMOND.

CHF 118 750

LOOSE EMERALD.

Large oval emerald cabochon of 176.24 ct, Colombia, moderate, oil and resin, back part with one large chip. 39.75 x 34.56 x 18.49 mm.
LOOSE EMERALD.
LOOSE EMERALD.

CHF 218 750

PEARL AND DIAMOND NECKLACE, probably CARTIER, London, ca. 1920.

Clasp platinum 950 and white gold 750, 52g.
A strand of 31 graduated round, roundish and oval white to slightly cream-coloured saltwater natural pearls of ca. 7.8 - 11.5 mm Ø, spaced by faceted diamond-rondelles of ca. 5.3 - 7.2 mm Ø. The clasp set with 1 bouton-shaped dark grey saltwater natural pearl of ca. 14.2 mm Ø, 2 old pear-shaped diamonds weighing ca. 1.60 ct, 4 old marquise-cut diamonds totalling 0.80 ct and 10 old square-cut diamonds totalling ca. 1.80 ct. Engraved Cartier London. L ca. 41 cm.
PEARL AND DIAMOND NECKLACE, probably CARTIER, London, ca. 1920.
PEARL AND DIAMOND NECKLACE, probably CARTIER, London, ca. 1920.

CHF 400 000