An unheated colour-change Ceylon sapphire solitaire ring, featuring an octagonal step-cut sapphire

UNHEATED CEYLON SAPPHIRE AND DIAMOND RING Containing one oval modified step cut sapphire measuring approximately 15.88 x 9.80 x 4.10 mm and 12 round brilliant cut diamonds weighing approximately 3.00

CEYLON, ORANGE-YELLOW SAPPHIRE AND DIAMOND RING Containing one octagonal step cut orange-yellow sapphire measuring approximately 13.12 x 11.13 x 9.78 mm and 62 round brilliant cut diamonds weighing ap

Crafted in platinum, featuring a modified cushion-cut unheated Ceylon sapphire, weighing approximately 10.50 carats, featuring 38 round brilliant-cut diamonds, weighing approximately 0.76 carat; ring

A COLOUR CHANGE SAPPHIRE AND DIAMOND CLUSTER RING, SRI LANKA (CEYLON), NO HEATThe cushion cut sapphire with blue to purple colour change estimated to weigh 9.30 carats, within a surround of old mine c

SAPPHIRE AND DIAMOND RING, CIRCA 1950 The octagonal step-cut sapphire, weighing 19.33 carats, between brilliant-cut diamond accents, within radiating courses of baguette-cut diamonds, in a raised wire

SAPPHIRE AND DIAMOND RING Containing one octagonal step cut sapphire measuring approximately 10.10 x 8.75 x 5.30 mm, two triangular and two baguette cut diamonds weighing approximately 1.10 carats tot

A Retro Rose Gold, Sapphire and Diamond Ring, containing one octagonal step cut sapphire measuring approximately 5.84 x 4.44 x 2.80 mm and two old mine cut diamonds weighing approximately 0.40 carat t

A SAPPHIRE AND DIAMOND RING set with an octagonal step cut sapphire of 0.62 carats accented on each side by a round brilliant cut diamond, no assay marks, size O / 7, 2.3g.

Ladies 18kt white gold sapphire and diamond ring featuring prong set rectangular step cut blue sapphire and prong set oval cut pink sapphire weighing approx. 2.56ct., Each surrounded by halos of prong

14 kt. White Gold, Yellow Sapphire and Diamond Ring , center prong set octagonal step cut yellow sapphire, wt. 1.39 cts., 6.35 x 4.97 x 4.25 mm; double halo and support with 66 square and round brilli

Ladies platinum sapphire and diamond ring featuring a prong set rectangular step cut sapphire weighing approx. 1.42ct.. Surrounded by a floral frame of prong set round brilliant cut diamonds weighing

18kt yellow gold sapphire and diamond ring featuring a bezel set rectangular step cut sapphire weighing approx. 0.40ct.. Accented with channel set round rectangular step cut diamonds weighing approx.

AN UNHEATED SAPPHIRE, DIAMOND AND ENAMEL DRESS in platinum, set to the centre with an unheated Madagascan octagonal step cut sapphire of 1.30 carats in a border of black enamel and round brilliant cut

AN EARLY 20TH CENTURY SYNTHETIC COLOUR-CHANGE SAPPHIRE AND DIAMOND CLUSTER RING a cushion-cut synthetic colour-change sapphire within a milgrain border of round-cut diamonds. Estimated total diamond w

Men's 14kt yellow gold sapphire and diamond ring featuring a bezel set rectangular step cut dark blue sapphire weighing approx. 1.50ct.. Accented with a frame of channel set round brilliant cut diamon

Synthetic Color Change Sapphire, 14k Yellow Gold Ring. Featuring one round-cut synthetic color change sapphire weighing approximately 8.40 cts., set in a 14k yellow gold mounting. {Size 8, Gross Weigh

Synthetic Color-Change Sapphire, 14k Yellow Gold Ring. Featuring one oval-cut synthetic color-change sapphire weighing approximately 29.45 cts., set in a 14k yellow gold mounting. {Size: 6 1/2, Gross

A sapphire and diamond ringdesigned as an octagonal step-cut sapphire, weighing approximately 2.20, flanked by triangular-cut diamonds, each weighing approximately 0.38 or 0.40 carat, mounted in plati

14K yellow gold amorphous ring featuring a cushion cut sapphire with Ceylon color, measuring approx. 11 x 8 mm, three round cut diamonds measuring approx. 2.2 mm each, front of ring measures approx. 1

14K white gold ring featuring a cushion cut sapphire weighing 9.15 carats accompanied by GIA Sapphire Report #1206809331, with a double row halo of diamonds weighing approx. 1.50 ctw with an average c

A COLOUR CHANGE SAPPHIRE AND DIAMOND CLUSTER RING in 18ct white gold, set with a central cushion cut sapphire of 5.13 carats, encircled by a border of single cut diamonds, later British import marks,

18 kt. White Gold, Unheated Ceylon Sapphire and Diamond Ring, center prong set cushion mixed cut unheated Ceylon blue sapphire, wt. approx. 11.31 cts., approx. 13.73 x 10.75 x 7.41 mm; shoulders with

UNHEATED COLOR-SHIFT CEYLON SAPPHIRE AND DIAMOND RING Containing one cushion modified mixed cut Ceylon sapphire measuring approximately 9.96 x 9.25 x 7.55 mm and 12 old European cut diamonds weighing

Platinum ring featuring a natural oval cut sapphire originating from Burma with no evidence of heat treatment, weighing 3.58 cts and measuring 10.37 x 8.45 x 4.36 mm, with GIA certification #217582307