An impressive Edwardian pendant featuring a large cabochon amethyst and diamonds set in platinum. The amethyst is pierced and set with a .25ct H/SI1 diamond and surrounded by a halo of small old European cut and rose cut diamonds. The bail is similarly set with rose cut diamonds. The pendant has a very dramatic appeal, yet the openness of the setting keeps it from being overpowering. Tested and guaranteed platinum (chain is silver).

Origin: America, ca. 1915...

A lovely French garland-style pendant/brooch in platinum and set with diamonds. The garland style, popularized by Cartier, heavily borrowed Louis XVI motifs such as bows, ribbons and laurel wreaths—all seen in this example. When worked in platinum, the designs take on a delicate appearance and allow the diamonds to shine. The center old European cut diamond, graded as J/SI1, weighs .48 carat...

A very fine pair of platinum, diamond and sapphire earrings in a classic line pattern. The brilliant round-cut diamonds graduate from .10 ct at the top to .20 ct at the bottom. The diamonds are finely matched at H color, SI1 to SI2 clarity, with good to very good cut. The modified-brilliant round-cut sapphires have a beautiful limpid medium violet-blue color, excellent brilliance and eye-clean clarity. Each stone is set in a fully articulated mounting with a pierced gallery...

A masterfully handcrafted antique diamond and platinum engagement ring is centered by an approximately 1.20Ct old-mine diamond. The center stone that is not certified has K-L color and VS2 clarity. The intricately detailed openwork setting is further enhanced by fourteen smaller single-cut diamonds. The approximate total weight of all diamonds is 1.45Ct. The ring is a size 7 ¼ and can easily be sized.

Beautiful 5.2 carat Rubellite Tourmaline set in platinum with six diamonds. Simple and elegant, the ring is approximately a size 7. The diamonds on the sides are well cut and matched and weigh approximately 0.10 cttw. It is stamped on the inside "10% IRID PLAT". The overall weight is 4 grams.

Take her breath away with this pristine platinum and diamond engagement ring. Dating from the 1920’s and showing characteristic Deco influences from the prongs to the shank, this stunner features a 1.02 carat round center stone. The exquisite diamond is EGL certified as H color and VS2 clarity. Eight single-cut diamonds of various sizes accentuate the flourishes on either side of the stone, lending to the 1.20 carat total weight.The ring is a size 6 1/2 and it can easily be sized.

A fine and very lovely Art Nouveau pendant or brooch worked in platinum and 18K yellow gold, every visible surface is set with old mine cut and old European cut diamonds of various sizes. The design depicts are central flower surrounded by foliage twisted into whiplash curves and sprinkled with flower buds. The construction is very solid and quite heavy, but the openwork maintains a feeling of lightness...

A gorgeous Art Deco platinum mounting sprinkled with diamonds and featuring a pair of round brilliant cut aquamarines. The crown of the ring rises well up off the finger, creating a sort of umbrella effect that nestles the aquamarines. The diamonds larger diamonds in the setting are old European cuts and the smaller ones are single cuts. All are in the H/I color range with VS clarity. The mounting is finished with expert milgraining and ornate piercing.

• Origin: America, ca...

Spectacular platinum dinner ring with prong set 23.78 ct brilliant cut oval blue natural topaz dinner ring with a split shank. The topaz measures 20 x 15 x 11 mm and is surround by 40 prong set brilliant cut diamonds with an approximate total weight of 1.68 ct. The ring's focal design is 29 mm long and 25 mm wide. Condition is excellent, like new. Appraisal attached.

A spectacular Art Deco period platinum brooch with bezel set round and baguette diamonds comprising over 6 carats of diamonds, Circa 1925. The piece measures approx 2" by 1". It is not marked, but tests platinum. The brooch weighs 8.9 grams and is in excellent condition. A rare find that is elegant simplicity.

A stunning Art Deco platinum ring featuring an antique cushion cut 9.03-carat Ceylon sapphire flanked on either side by three baguette diamonds arranged in a stepped pattern. The sapphire is graded on the GIA scale as vB5/4 (medium tone, moderate-strong saturation, violetish blue color), with eye-clean clarity and excellent cut. The stone's internal characteristics suggest Ceylon as the most likely origin. The overall look is a lovely cornflower blue with a tinge of violet mixed in...

An elegant Art Deco platinum filigree ring centered by a .70 old European cut diamond mounted in an octagonal surround of caliber cut synthetic sapphires (typical of genuine Art Deco period rings). The platinum setting is beautifully pierced at the front and the shank is engraved in a foliate pattern completely around. The diamond is graded as G/H color and VVS1 clarity, and has excellent cut with fine brilliance. The sapphires are bright and provide a nice pop of color...

A lovely Art Deco white gold and platinum filigree bracelet featuring three diamond-set frosted and engraved crystal plaques alternating with bezel-set pale blue spinels. The use of pale blue spinels the color of aquamarines is a very unusual treatment in a bracelet of this type, and the overall effect is very pretty. All the platinum surfaces are engraved in a delicate foliate motif. The clasp is stamped for 14K and platinum and has an unidentified maker’s mark.

Origin: America, ca. 1920...