A few examples of appraisal values for
DIAMOND ONYX BAR BROOCH

• An Onyx Diamond and Coral Brooch
  An Onyx Diamond and Coral Brooch The pin is designed with a carved onyx circle inlaid with diamonds. Braced on the sides with diamond-set sections supporting pink coral diamond and onyx sections which are set with accent diamonds on top and bottom - nice touch. Mounted in 18k yellow gold total diamond weight approx. 1-1/2"L x 1"W.
• DIAMOND AND ONYX BAR BROOCH
  DIAMOND AND ONYX BAR BROOCH Containing 15 old European cut diamonds weighing approximately 1.00 carat total and eight French cut onyx. Mounted in platinum. 2 3/4 inches long. Gross weight: 4.90 dwt.
• An Art Deco Style Onyx Diamond
  An Art Deco Style Onyx Diamond and Coral Brooch The brooch is designed with a round onyx center braced diagonally with diamond set decorations on the side each accented with coral cabochons. Total diamond weight approx. 0.60 ct. Mounted in 18k white and yellow gold combination. Unmarked. Measures approx. 1-1/2" x 7/8". Weight 6.5 gm.
• A Tiffany & Co Gold and Onyx Brooch
  A Tiffany & Co Gold and Onyx Brooch 14k yellow gold brooch featuring an open onyx square with X shape braces on the sides. Signed on back. Measures approx. 1-1/4"L x 1"W. Overall weight approx. 9.7 gm. Offered with a Tiffany pouch and box.
• An Art Deco Style Onyx, Diamond and
  An Art Deco Style Onyx, Diamond and Coral Brooch The pin is designed with a carved onyx circle inlaid with diamonds. Braced on the sides with diamond-set sections supporting pink coral, diamond and onyx sections, which are set with accent diamonds on top and bottom - nice touch. Mounted in 18k yellow gold, total diamond weight approx. 1-1/2"L x 1"W.
• GOLD DIAMOND ONYX ARROW BROOCH
  GOLD DIAMOND ONYX ARROW BROOCH PIN 14KGold arrow brooch with diamonds on the tip and feathers. A line of 6 onyx separate the feathers. One onyx has tiny chip. Brooch measures approx. 3" long, 4.6 grams. shipping info This lot can be shipped in-house.
• 18K GOLD, DIAMOND, AND ONYX JABOT
  18K GOLD, DIAMOND, AND ONYX JABOT BROOCH18K Gold, Diamond, and Onyx Jabot Brooch, the jabot brooch with two polished black onyx hearts measuring approx. 20.50 x 21.50 mm. and eight single-cut diamonds weighing approx. 0.25 tcw.; 10.37 dwts.; lg. 3 1/3 in. Condition:
• A 14 Karat Yellow Gold Onyx and
  A 14 Karat Yellow Gold Onyx and Seed Pearl Bar Brooch containing six pyramid shape onyx sections separated by 20 seed pearls in a yellow gold setting with millegrain accents. 4.60 dwts.
• 18K DIAMOND & ONYX BROOCH: 18K
  18K DIAMOND & ONYX BROOCH: 18K yellow gold hammered geometric design brooch contains 15 round brilliant cut diamonds. WEIGHT: .75 Ct. Approx. Rated VS in clarity and G-H in color. The diamonds are pave set. Geometric shaped carved onyx. Bar pin closure. Signed: KEIL. Weight: 28.1 grams. Length: 2.25''
• An Art Deco Platinum Diamond and
  An Art Deco Platinum Diamond and Onyx Brooch in a tonneau shape openwork design with millegrain accents containing numerous old European cut diamonds weighing approximately 1.70 carats total and six carved onyx sections. 4.75 dwts.
• 18K GOLD, DIAMOND, AND ONYX JABOT
  18K GOLD, DIAMOND, AND ONYX JABOT BROOCH18K Gold, Diamond, and Onyx Jabot Brooch the jabot brooch with two polished black onyx hearts measuring approx. 20.50 x 21.50 mm. and eight single-cut diamonds weighing approx. 0.25 tcw.; 10.37 dwts.; lg. 3 1/3 in. Condition:
• Onyx and diamond starburst brooch
  Onyx and diamond starburst brooch victorian Onyx disk set into 14 karat yellow gold, hand etched setting, open framed back (where a hair memorial might be added). The brooch is accented by a Moravian style star in the center set with Old Mine cut diamonds in sterling silver. Can be worn as a brooch or as a pendant. PROVENANCE: Property of a Pennsylvania lady. Brooch is in very good condition with no chipping or loss at this time to the onyx or diamond portions, gold does not display any scratching or denting at this time. Color: KLM Clarity: I
• Victorian American Onyx, Gold and
  Victorian American Onyx, Gold and Pearl Bar Brooch, ca. 1875, the rectangular onyx body with a fourteen-karat yellow gold ribbon and foliage set with natural split pearls, the reverse with pin back.
• A Black Onyx and Diamond Bow Brooch
  A Black Onyx and Diamond Bow Brooch 14k white gold brooch in the for of a bow, inlaid with black onyx in the center and surrounded with round brilliant cut diamonds, total diamond weight approx. 1 ct. Measures approx. 2-1/8"L x 3/4"W. Weight approx. 11.3 gm.
• * A 14 Karat Yellow Gold Onyx and
  * A 14 Karat Yellow Gold Onyx and Diamond Cameo Brooch consisting of one oval onyx cameo measuring approximately 26.00 x 18.75 mm depicting a beauty in profile within a gold bezel surround containing seven round brilliant cut diamonds weighing approximately 0.12 carat total. Stamp: 585 (maker's mark) 0.12. 3.20 dwts.
• PLATINUM, DIAMOND AND BLACK ONYX
  PLATINUM, DIAMOND AND BLACK ONYX ART DECO BROOCHPlatinum, Diamond and Black Onyx Art Deco Brooch, Featuring a ring shape tablet cut Black Onyx, 36.20 mm. in diameter by 7.10 mm. wide, set with 88 single cut round Diamonds [I/VS], total weight 0.64 carats; brooch weighs 12.20 grams; Condition: one onyx stone loose; Condition:
• A diamond bar brooch, with
  A diamond bar brooch, with central oval panel, 4.5cm wide and a diamond and pearl bar brooch
• GOLD, BLACK ONYX, AND DIAMOND
  GOLD, BLACK ONYX, AND DIAMOND BROOCH The black onyx disc set to the center with a rose cut diamond (6.15mm), on gold mount with single pin stem and open bail, testing 14KT.
• A yellow metal (tests 15 carat
  A yellow metal (tests 15 carat gold) onyx and pearl set bar brooch with locket back approx. 4 cm long.
• An Art Deco Platinum Diamond and
  An Art Deco Platinum Diamond and Onyx Converted Jabot Pin Platinum mounted brooch designed as two open leaves each set in the center with an oval onyx cabochon approx. 7.8 x 6.3 mm and further enhanced by round cut diamonds total estimated diamond weight approx. 0.40 ct. Measures approx. 2-1/4"L x 1/2"W. Overall weight approx. 6.3 gm.
• A fine white metal (tests platinum)
  A fine white metal (tests platinum) diamond and onyx brooch the central old cut diamond measuring approx. 4.5 mm diameter x 3 mm deep estimated to weigh approx. 0.5 carat approx. 5 cm long circa 1920.
• Diamond, Frosted Rock Crystal and
  Diamond, Frosted Rock Crystal and Black Onyx Brooch, Marcus Estimate:$2,500-$3,500
• Diamond and Black Onyx Motorcycle
  Diamond and Black Onyx Motorcycle Brooch Estimate:$300-$500
• A Victorian Onyx Mourning Brooch
  A Victorian Onyx Mourning Brooch ca. 1850 Carved black onyx brooch in the form of a starched quatrefoil inlaid with yellow gold cross shape set with seed pearls and accent diamonds. Gold-filled back mounting has a memento section. Overall weight 4.8 gm.
• Onyx and Stone Cameo A black onyx
  Onyx and Stone Cameo A black onyx brooch with white stone raised cameo profile of lady in a 14K gold setting with scroll design. Piece can also be used as a pendant. Measurements are ht. 1.75.
• An Art Deco Platinum Diamond and
  An Art Deco Platinum Diamond and Onyx Brooch containing one old European cut diamond weighing approximately 1.20 carats two old European cut diamonds weighing approximately 1.90 carats total two old European cut diamonds weighing approximately 1.06 carats total four square step cut diamonds weighing approximately 0.48 carat total numerous old European cut diamonds weighing approximately 1.60 carats total and numerous calibre cut onyx within an openwork plaque setting with millegrain accents and a piercework double gallery brooch measures approximately 51.00 x 19.00 mm. 10.10 dwts.
• A yellow metal (tests 18 ct gold)
  A yellow metal (tests 18 ct gold) onyx and diamond star brooch and pendant. Est. diamond content approx. 1 ct. Approx. 3.5 cm diam. C. 1905
• PLATINUM, DIAMOND AND PEARL
  PLATINUM, DIAMOND AND PEARL BROOCHDESCRIPTION: A Brooch composed of a Platinum foundation, encrusted by 5cts of diamonds over floral motifs, further accented with two onyx bars. Stamped along the back "Plat" Total Weight: 30 Grams (19 dwt) CIRCA: 20th Cent. ORIGIN: USA DIMENSIONS: 3x1" CONDITION: Great condition. See lot description for details on item condition. More detailed condition requests can be obtained via email (info@akibaantiques.com) or SMS (305) 333-4134. Any condition statement given, as a courtesy to a client, is only an opinion and should not be treated as a statement of fact. Akiba Antiques shall have no responsibility for any error or omission.
• A diamond bar brooch with seven
  A diamond bar brooch with seven graduating stones flanked by fourteen smaller stones set in platinum 8cm (3.25") wide
• Onyx and diamond bow brooch, J.E.
  Onyx and diamond bow brooch, J.E. Caldwell & Co. art deco Platinum bow brooch accented by forty petite circular cut diamonds and black onyx fill. L: 1 1/2 in. PROVENANCE: Property of a Pennsylvania lady. Brooch is in very good condition, with no signs of loss visible at this time, all wear is consistent with age and use. Onyx is in good condition and does appear to have been replaced. Color: GHI Clarity: N/A
• 18-KARAT WHITE-GOLD, BLACK ONYX,
  18-KARAT WHITE-GOLD, BLACK ONYX, DIAMOND AND BLUE SAPPHIRE BROOCH18-Karat White-Gold, Black Onyx, Diamond and Blue Sapphire Brooch, In the Art Deco style, having a circular black onyx ring, flanked by a pavé of round brilliant-cut diamonds and channel-set square-cut blue sapphires. Gross weight: 9.5 dwt. Length: 1-1/4 in (3.1 cm) Width: 2 in (5.1 cm)Property from a Washington, DC Trust
• DIAMOND, BLACK ONYX AND
  DIAMOND, BLACK ONYX AND MOTHER-OF-PEARL BAR PIN.DIAMOND, BLACK ONYX AND MOTHER-OF-PEARL BAR PIN. The 18k yellow gold bar win with two sections of mother-of-pearl, two sections of black onyx and channel set with three rows of round-cut diamonds. Total estimated weight for all nine diamonds: 0.18 cttw. The bar pin measures just under 1-3/4 inches in length.
• 18K DIAMOND, ONYX AND MOTHER OF
  18K DIAMOND, ONYX AND MOTHER OF PEARL BUTTERFLY BROOCH18k butterfly brooch with diamond, onyx and mother of pearl. There are twelve full cut diamonds weighing approx. .13 ct TW, VS-2/SI-1 clarity, G-H color. There are eight custom cut buff top onyx sections black color, opaque. There are sixteen custom cut buff top mother of pearl shell sections, white to grayish black color. Dimensions: 40mm long with wingspan 37mm wide. Total gross weight: 22.4 grams. Processing and shipping within the continental U.S. $25.00 plus 1.5% replacement cost insurance. Condition: Very good. Witherell's strives to provide as much information and photographs as possible but encourages in-person inspection by bidders. Condition: statements are only for general guidance and should not be relied upon as complete statements of fact and do not constitute a representation, warranty or assumption of liability by Witherell's. All lots are sold "AS IS" under terms and conditions. Please be advised we do not provide porters nor packing materials for pick ups.
• A yellow metal (tests 18 ct gold)
  A yellow metal (tests 18 ct gold) onyx and diamond star brooch/pendant. Estimated diamond content 1 ct approx. 3.5 cm diameter circa 1905.
• TIFFANY & CO. PLATINUM, DIAMOND,
  TIFFANY & CO. PLATINUM, DIAMOND, ONYX, AND RUBY BROOCHTIFFANY & CO. Platinum, Diamond, Onyx, and Ruby Brooch, the circle brooch with full-cut diamonds, French-cut onyx, and a round cabochon ruby; signed; 7.55 dwts.; dia. 1 1/4 in.; boxed Condition: Condition: overall good condition
• Diamond Bar Brooch
  Diamond Bar Brooch Estimate:$1,000-$1,500