Royal & Noble Jewels

$14.4m in total, buyer’s premium included

65 of 65 lots sold

The sale on sothebys.com ↗︎

Top lots per carat 8 lots · the highest prices per carat of the sale

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$338,500per carat Lot 665 Historically important and highly significant diamond brooch/pendant 13.04 ct ×17.6 high estimate Estimate USD 150k – 250k USD 4,414,041$338,500 per carat $263,393per carat Lot 621 Magnificent and historical light pink diamond and diamond ring 13.86 ct · VS2 ×7.3 high estimate Estimate USD 300k – 501k USD 3,650,626$263,393 per carat $26,427per carat Lot 653 Spinel and diamond ring 4.21 ct · Burma · No heat ×2.0 high estimate Estimate USD 31k – 56k USD 111,258$26,427 per carat $20,183per carat Lot 628 Natural pearl and diamond brooch 1.89 ct ×2.5 high estimate Estimate USD 10k – 15k USD 38,146$20,183 per carat $10,229per carat Lot 645 Unique pink sapphire and diamond bangle 2.02 ct · Burma · No heat ×0.8 high estimate Estimate USD 15k – 25k USD 20,662$10,229 per carat $6,921per carat Lot 655 Sapphire and diamond ring 6.43 ct · Ceylon · No heat ×1.4 high estimate Estimate USD 19k – 33k USD 44,503$6,921 per carat $4,766per carat Lot 619 Diamond ring 6.67 ct ×1.8 high estimate Estimate USD 14k – 18k USD 31,788$4,766 per carat $4,055per carat Lot 657 Unmounted emerald 10.19 ct · Colombia ×1.3 high estimate Estimate USD 19k – 33k USD 41,325$4,055 per carat

Sapphires 2 lots

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AllBurma 1Ceylon 1

$10,229per carat Lot 645 Unique pink sapphire and diamond bangle 2.02 ct · Burma · No heat ×0.8 high estimate Estimate USD 15k – 25k USD 20,662$10,229 per carat $6,921per carat Lot 655 Sapphire and diamond ring 6.43 ct · Ceylon · No heat ×1.4 high estimate Estimate USD 19k – 33k USD 44,503$6,921 per carat

Emeralds 2 lots

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Colombia

$4,055per carat Lot 657 Unmounted emerald 10.19 ct · Colombia ×1.3 high estimate Estimate USD 19k – 33k USD 41,325$4,055 per carat $1,665,747price paid Lot 663 Superb emerald and diamond pendent necklace Colombia · Minor oil ×2.7 high estimate Estimate USD 375k – 626k USD 1,665,747

Colourless diamonds 2 lots

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$338,500per carat Lot 665 Historically important and highly significant diamond brooch/pendant 13.04 ct ×17.6 high estimate Estimate USD 150k – 250k USD 4,414,041$338,500 per carat $263,393per carat Lot 621 Magnificent and historical light pink diamond and diamond ring 13.86 ct · VS2 ×7.3 high estimate Estimate USD 300k – 501k USD 3,650,626$263,393 per carat

Pearls and cultured pearls 10 lots

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AllNatural pearls 6Cultured pearls 2Pearls, type not stated 2

$445,033price paid Lot 661 Rare and historically important natural pearl and diamond jewel and a brooch ×0.7 high estimate Estimate USD 426k – 626k USD 445,033 $114,437price paid Lot 631 Natural pearl and diamond sautoir ×1.9 high estimate Estimate USD 40k – 60k USD 114,437 $77,881price paid Lot 647 Natural pearl and glass necklace ×1.6 high estimate Estimate USD 30k – 50k USD 77,881 $60,397price paid Lot 642 Natural pearl sautoir ×1.4 high estimate Estimate USD 35k – 44k USD 60,397 $20,183per carat Lot 628 Natural pearl and diamond brooch 1.89 ct ×2.5 high estimate Estimate USD 10k – 15k USD 38,146$20,183 per carat $12,715price paid Lot 630 Pair of natural pearl and diamond earrings ×2.0 high estimate Estimate USD 4k – 6k USD 12,715 $15,099price paid Lot 605 Gold and cultured pearl parure ×2.7 high estimate Estimate USD 4k – 6k USD 15,099 $7,629price paid Lot 616 Pair of cultured pearl and diamond earclips ×2.0 high estimate Estimate USD 3k – 4k USD 7,629 $60,397price paid Lot 658 Hardstone, pearl, sapphire and diamond pendent necklace ×1.0 high estimate Estimate USD 38k – 63k USD 60,397 $17,483price paid Lot 629 Pearl and diamond tiara ×1.7 high estimate Estimate USD 8k – 10k USD 17,483

Signed jewels 12 lots

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Allattributed to Boucheron 1attributed to Kutchinsky 1Cartier 2Chaumet 1Gübelin 1JAR 1Koch 1Koenig 1monture Cartier 1Van Cleef & Arpels 2

$71,523price paid Lot 648 Diamond tiara/bracelet combination ×1.9 high estimate Estimate USD 25k – 38k USD 71,523 $12,715price paid Lot 617 Diamond ring ×2.0 high estimate Estimate USD 4k – 6k USD 12,715 $1,665,747price paid Lot 663 Superb emerald and diamond pendent necklace Colombia · Minor oil ×2.7 high estimate Estimate USD 375k – 626k USD 1,665,747 $20,662price paid Lot 607 Coral, emerald and sapphire brooch ×2.8 high estimate Estimate USD 5k – 8k USD 20,662 $190,729price paid Lot 649 Impressive diamond brooch/devant-de-corsage ×1.4 high estimate Estimate USD 75k – 138k USD 190,729 $2,225price paid Lot 606 Lady'S gold wristwatch ×1.5 high estimate Estimate USD 1k – 2k USD 2,225 $60,397price paid Lot 658 Hardstone, pearl, sapphire and diamond pendent necklace ×1.0 high estimate Estimate USD 38k – 63k USD 60,397 $20,183per carat Lot 628 Natural pearl and diamond brooch 1.89 ct ×2.5 high estimate Estimate USD 10k – 15k USD 38,146$20,183 per carat $13,510price paid Lot 654 Pair of sapphire and diamond earclips ×1.3 high estimate Estimate USD 8k – 10k USD 13,510 $190,729price paid Lot 659 Ruby and diamond necklace ×1.0 high estimate Estimate USD 125k – 188k USD 190,729 $133,510price paid Lot 620 Elegant sapphire and diamond double-clip brooch ×4.1 high estimate Estimate USD 21k – 33k USD 133,510 $111,258price paid Lot 651 Gold and diamond bracelet ×3.0 high estimate Estimate USD 25k – 38k USD 111,258

Other jewels 38 lots

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$1,049,007price paid Lot 664 Historical and important unmounted green beryl ×17.5 high estimate Estimate USD 40k – 60k USD 1,049,007 $492,716price paid Lot 660 Fine diamond tiara ×2.3 high estimate Estimate USD 125k – 213k USD 492,716 $171,656price paid Lot 641 Charming ruby and diamond necklace ×2.3 high estimate Estimate USD 50k – 75k USD 171,656 $150,993price paid Lot 662 Splendid diamond tiara ×1.0 high estimate Estimate USD 100k – 150k USD 150,993 $87,417price paid Lot 650 Diamond bracelet ×1.5 high estimate Estimate USD 40k – 60k USD 87,417 $66,755price paid Lot 622 Embroidery sample for the coronation dress of queen elizabeth ii ×10.7 high estimate Estimate USD 4k – 6k USD 66,755 $61,987price paid Lot 610 Emerald, enamel and diamond pendant ×24.8 high estimate Estimate USD 1k – 3k USD 61,987 $60,397price paid Lot 640 Charming diamond tiara ×1.1 high estimate Estimate USD 31k – 56k USD 60,397 $55,629price paid Lot 639 Turquoise and diamond parure ×0.9 high estimate Estimate USD 25k – 63k USD 55,629 $55,629price paid Lot 637 Fine imperial topaz and diamond brooch ×5.6 high estimate Estimate USD 6k – 10k USD 55,629 $50,861price paid Lot 636 Diamond necklace ×1.2 high estimate Estimate USD 28k – 44k USD 50,861 $50,861price paid Lot 618 Diamond necklace ×4.1 high estimate Estimate USD 8k – 13k USD 50,861 $50,861price paid Lot 626 Gold and diamond evening bag ×5.1 high estimate Estimate USD 8k – 10k USD 50,861 $49,272price paid Lot 625 Pair of shell and turquoise earclips ×4.9 high estimate Estimate USD 6k – 10k USD 49,272 $41,325price paid Lot 611 Diamond brooch ×5.5 high estimate Estimate USD 5k – 8k USD 41,325 $34,967price paid Lot 644 Ruby and diamond ring ×0.9 high estimate Estimate USD 13k – 38k USD 34,967 $34,967price paid Lot 656 Sapphire and diamond demi-parure ×1.9 high estimate Estimate USD 13k – 19k USD 34,967 $31,788price paid Lot 643 Diamond tiara ×0.8 high estimate Estimate USD 25k – 38k USD 31,788 $30,199price paid Lot 638 Turquoise and diamond demi-parure ×3.0 high estimate Estimate USD 8k – 10k USD 30,199 $23,841price paid Lot 635 Diamond devant-de-corsage ×0.7 high estimate Estimate USD 18k – 33k USD 23,841 $20,662price paid Lot 634 Diamond necklace ×0.8 high estimate Estimate USD 19k – 25k USD 20,662 $17,483price paid Lot 633 Diamond bracelet ×0.9 high estimate Estimate USD 9k – 19k USD 17,483 $17,483price paid Lot 601 Gold bracelet ×2.0 high estimate Estimate USD 6k – 9k USD 17,483 $17,483price paid Lot 627 Pair of sapphire and emerald bracelets ×2.0 high estimate Estimate USD 6k – 9k USD 17,483 $15,099price paid Lot 602 Sapphire and diamond demi-parure ×2.4 high estimate Estimate USD 4k – 6k USD 15,099 $13,510price paid Lot 652 Aquamarine and diamond brooch ×1.8 high estimate Estimate USD 5k – 8k USD 13,510 $12,715price paid Lot 624 Gold, ruby and diamond bracelet and an enamel, sapphire and diamond ring ×1.7 high estimate Estimate USD 5k – 8k USD 12,715 $11,921price paid Lot 632 Sapphire, ruby and diamond brooch ×1.1 high estimate Estimate USD 7k – 11k USD 11,921 $11,921price paid Lot 609 Diamond ring ×7.9 high estimate Estimate USD 1k – 2k USD 11,921 $11,126price paid Lot 604 Gold and diamond brooch, bucherer and a pair of earclips ×4.4 high estimate Estimate USD 2k – 3k USD 11,126 $10,331price paid Lot 614 Diamond double-clip brooch ×1.7 high estimate Estimate USD 4k – 6k USD 10,331 $9,536price paid Lot 603 Gold bracelet ×1.7 high estimate Estimate USD 5k – 6k USD 9,536 $9,536price paid Lot 615 Morganite and diamond ring ×6.3 high estimate Estimate USD 1k – 2k USD 9,536 $8,742price paid Lot 608 Gold longchain ×1.4 high estimate Estimate USD 4k – 6k USD 8,742 $7,947price paid Lot 646 Emerald and diamond brooch ×0.9 high estimate Estimate USD 6k – 9k USD 7,947 $7,947price paid Lot 613 Emerald and diamond ring and a sapphire and diamond ring ×1.3 high estimate Estimate USD 4k – 6k USD 7,947 $4,450price paid Lot 612 Pair of diamond earclips/dress clips ×1.2 high estimate Estimate USD 3k – 4k USD 4,450 $3,497price paid Lot 623 Ruby, emerald and diamond ring ×4.0 high estimate Estimate USD 626 – 876 USD 3,497

Prices are the prices paid, buyer’s premium included, as Sotheby’s publishes them; prices per carat and comparisons with the estimates use them too (Sotheby’s estimates do not include the premium). Prices in USD at the ECB rate of 12 November 2025. Photographs © Sotheby’s 2025.