Colored Diamond, Diamond, Platinum Ring, Linz. Photo Heritage Auctions

The ring features a pear-shaped yellow diamond weighing approximately 1.05 carats, enhanced by a pear-shaped brown diamond weighing approximately 1.00 carat, further enhanced by two marquise-shaped diamonds, one pink and one blue, each weighing approximately 0.60 carat, accented by tapered baguette-cut diamonds weighing a total of approximately 6.40 carats, complimented by baguette-cut diamonds weighing a total of approximately 0.90 carat, set in platinum. Total diamond weight is approximately 10.55 carats. Gross weight 11.05 grams. Size 6 (sizeable). Estimate: $15,000 - $20,000.. Lot sold $26,290.00

An EGL USA report # US 57208301J, dated March 4, 2011, identifies the colored diamonds as:

Natural Fancy to Fancy Intense Pink color, VS2 clarity
Color Enhanced Fancy to Fancy Blue Green color, VS1 clarity
Natural Fancy to Fancy Deep Yellow color, SI1 clarity
Undetermined color origin, Fancy to Fancy Deep Brownish Orangy Yellow color, SI2 clarity

Fancy Yellow Diamond, Diamond, Platinum, Gold Earrings. Photo Heritage Auctions

The huggie-style earrings feature full-cut diamonds, set in platinum, supporting detachable drops showcasing yellow cut corner square modified brilliant-cut diamonds measuring 6.96 x 6.90 x 4.80 mm and weighing a total of 4.25 carats, set in 18k gold, enhanced by full-cut diamonds, set in platinum. An EGL Laboratory report # US 902343401D, dated February 22, 2011, stating Fancy Light Yellow to Fancy Yellow color, VS1 clarity, accompanies the colored diamonds. Total diamond weight is approximately 4.60 carats. Gross weight 6.00 grams. Dimensions: 13/16 inch x 3/8 inch. Lot sold $23,900.00

Colored Diamond, Diamond, Gold Pendant-Brooch. Photo Heritage Auctions

The pendant-brooch features an emerald-cut diamond measuring 13.70 x 9.20 x 6.52 mm and weighing 6.70 carats, enhanced by square-cut diamonds weighing a total of approximately 2.60 carats, accented by full and single-cut diamonds weighing a total of approximately 2.80 carats, set in 18k gold, completed by scarf clips, retractable bail, pinstem and catch on the reverse. Total diamond weight is approximately 12.10 carats. An EGL USA report # US 57208201D, dated March 3, 2011, stating Light to Light Fancy Yellow Brown color, SI3 clarity, accompanies the main diamond. Gross weight 12.75 grams. Dimensions: 1-3/8 inches x 1-3/8 inches . Lot sold $22,705.00

The Property of the Margaret Nichols Trust

Fancy Yellow Diamond, Diamond, Platinum, Gold Ring. Photo Heritage Auctions

The ring features an oval modified brilliant-cut fancy yellow diamond measuring 11.10 x 8.80 x 4.00 mm and weighing 3.01 carats, set in 18k gold, enhanced by full-cut diamonds weighing a total of 0.82 carat, set in platinum. An EGL Laboratory report # 902153403D, dated January 23, 2011, stating Natural Fancy to Fancy Intense Yellow color, VS2 clarity, accompanies the center diamond. Total diamond weight is 3.83 carats. Gross weight 8.55 grams. Lot sold $21,510.00

Fancy Yellow Diamond, Diamond, Platinum, Gold Ring. Photo Heritage Auctions

The ring features a cut cornered rectangular modified brilliant-cut diamond measuring 7.10 x 6.60 x 4.43 mm and weighing 2.09 carats, enhanced by radiant-cut yellow diamonds: one measuring 6.60 x 5.60 x 3.40 and weighing approximately 1.02 carats; together with one measuring 6.60 x 5.60 x 3.20 mm and weighing approximately 0.99 carat, set in platinum, accented by full-cut diamonds weighing a total of 0.82 carat, set in platinum. An EGL Laboratory report # US 901596603D, dated November 5, 2010, stating Natural Fancy Yellow color, VS1 clarity, accompanies the center diamond. The yellow diamonds flanking the center diamond have not been tested for origin of color. Total diamond weight is approximately 4.74 carats. Gross weight 8.70 grams.. Estimate: $15,000 - $20,000.. Lot sold $16,730.00

Fancy Yellow Diamond, Diamond, Platinum, Gold Ring. Photo Heritage Auctions

The ring features a cut-cornered rectangular modified brilliant-cut diamond measuring 8.72 x 6.73 x 4.73 mm and weighing 2.69 carats, set in 18k gold, enhanced by trapezoid-shaped diamonds weighing a total of approximately 0.60 carat, set in platinum. A GIA Laboratory report #14264285, dated March 28, 2005, stating Fancy Yellow color, SI2 clarity, accompanies the center diamond. Gross weight 6.75 grams. Lot sold $16,730.00

Fancy Yellow Diamond, Diamond, Platinum, Gold Ring. Photo Heritage Auctions

The ring features a cushion-modified brilliant-cut diamond measuring 8.00 x 7.30 x 3.70 mm and weighing 2.01 carats, set in 18k gold, enhanced by full-cut diamonds weighing a total of 1.01 carats, set in platinum. An EGL Laboratory report # US 902052102D, dated January 6, 2011, stating Natural Fancy Yellow color, VVS2 clarity, accompanies the center diamond. Total diamond weight is 3.02 carats. Gross weight 7.65 grams. Lot sold $14,340.00

Unmounted Colored Diamond. Photo Heritage Auctions

The square-brilliant mixed-cut brown diamond measures 10.5 x 9.90 x 7.00 and weighs 6.21 carats (colored diamond not tested for origin of color). Lot sold $11,950.00

Heritage Auctions, 2 may 2011, New York http://jewelry.ha.com