Gemstones
Loose stones for setting and repair work. Cabochons and faceted stones in genuine, lab created, simulated and assembled material, alongside diamonds, moissanite and cultured freshwater pearls. Round, oval, marquise, pear, emerald, heart, cushion, square and trillion shapes in calibrated millimeter sizes from 1 mm up. Filter by stone, shape, size and color to match an existing mounting.
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Round Black Onyx Cabochon
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny quartz crystals not visible to the naked eye. Natur...
View full detailsCloseout Pack-15 Marquise 32x7mm Black Chalcedony Cabochon
Otto Frei5.0 / 5.0
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Chalcedony is a cryptocrystalline form of quartz, composed of tiny crystals too small to see with the naked eye. Natural black chalcedony is except...
View full detailsOval Genuine Hematite Cabochon
Otto FreiHematite is composed of iron oxide and exhibits a distinctive shiny, metallic luster that sets it apart from other gemstones. A traditional favorit...
View full detailsOval Black Onyx Cabochon
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye...
View full detailsRound Genuine Hematite Cabochon
Otto FreiHematite is composed of iron oxide, exhibiting a shiny, metallic luster. A traditional favorite in men's jewelry, hematite has the highest density ...
View full detailsOval Opal Triplet Cabochon
Otto FreiOpal is the world's most popular phenomenal gemstone, with many cultures believing that opals have supernatural origins and power. These oval opal ...
View full detailsOval Flat Top Double Bevel Genuine Black Onyx
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny quartz crystals that are not visible to the naked e...
View full detailsAntique Buff Top Single Bevel Genuine Black Onyx
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny quartz crystals not visible to the naked eye. Natur...
View full detailsAntique Flat Top Single Bevel Genuine Black Onyx
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye...
View full detailsOctagon Buff Top Double Bevel Genuine Black Onyx
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye...
View full detailsRound Picture Jasper Cabochon
Otto FreiPicture Jasper cabochons offer the natural beauty of an opaque chalcedony stone, prized for its tan base accented with brown and black dots, swirls...
View full detailsRound Opal Triplet Cabochon
Otto FreiOpal is the world's most popular phenomenal gemstone, with many cultures believing that opals have supernatural origins and power. These Round Opal...
View full detailsOval Buff Top Genuine Hematite Cabochon
Otto FreiHematite is composed of iron oxide, exhibiting a shiny, metallic luster that has made it a traditional favorite in men's jewelry. With the highest ...
View full detailsCloseout Rock Deco 2ct Black Raw Diamonds
Otto FreiThese black raw diamonds from Rock Deco are natural, uncut stones sourced from Africa, offered in 2 ct tw packs. Each pack contains approximately t...
View full detailsDruzy Quartz Black Oval 20mm x 15mm
Otto FreiDruzy Quartz adds a colorful, glittery texture to any jewelry at an affordable cost. The term "Druzy" refers to clusters of tiny crystals that form...
View full detailsCushion Buff Top Genuine Hematite Cabochon
Otto FreiHematite is composed of iron oxide, exhibiting a shiny, metallic luster. A traditional favorite in men's jewelry, hematite has the highest density ...
View full detailsOval Flat Top Double Bevel Genuine Black Onyx With Hole
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals that are not visible to the ...
View full detailsOval Buff Top Double Bevel Genuine Black Onyx
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny quartz crystals not visible to the naked eye. Natur...
View full detailsOval Buff Top Single Bevel Genuine Black Onyx
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye...
View full detailsOctagon Flat Top Double Bevel Genuine Black Onyx
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny quartz crystals not visible to the naked eye. Natur...
View full detailsOctagon Flat Top Single Bevel Genuine Black Onyx
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny crystals of quartz that are not visible to the nake...
View full detailsOctagon Buff Top Single Bevel Genuine Black Onyx
Otto FreiBlack onyx, also known as black agate, is dyed black chalcedony — one of the most enduring and versatile gem materials in the jeweler's palette. Ch...
View full detailsCushion Flat Top Double Bevel Genuine Black Onyx With Hole
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye...
View full detailsCushion Flat Top Single Bevel Genuine Black Onyx With Hole
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny crystals of quartz that are not visible to the nake...
View full detailsCushion Buff Top Double Bevel Genuine Black Onyx
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye...
View full detailsCushion Buff Top Single Bevel Genuine Black Onyx
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye...
View full detailsAntique Buff Top Double Bevel Genuine Black Onyx
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye...
View full detailsCushion Buff Top Double Bevel Genuine Black Onyx With Hole
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye...
View full detailsCushion Flat Top Single Bevel Genuine Black Onyx
Otto FreiBlack Onyx — also known as black agate — is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked e...
View full detailsCushion Buff Top Single Bevel Genuine Black Onyx With Hole
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny quartz crystals not visible to the naked eye. Natur...
View full detailsOval Buff Top Double Bevel Genuine Black Onyx With Hole
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of microscopic quartz crystals not visible to the naked eye...
View full detailsMarquise Opal Triplet Cabochon
Otto FreiOpal is the world's most popular phenomenal gemstone, with many cultures believing that opals have supernatural origins and power. These Marquise O...
View full detailsAntique Flat Top Double Bevel Genuine Black Onyx with Hole
Otto FreiBlack Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny quartz crystals not visible to the naked eye. Natur...
View full detailsOval Picture Jasper Cabochon
Otto FreiJasper is an opaque chalcedony that can display a variety of colors and patterns, making each stone unique and one-of-a-kind. Picture Jasper tends ...
View full detailsCloseout Pack of 10 Black Princess-Square 9x9mm Cubic Zirconia Hand Cut
Otto FreiTake advantage of closeout pricing on this pack of 10 black princess-square cubic zirconia stones. These 9x9mm CZs are hand cut and graded B qualit...
View full detailsCloseout Pack of 10 Black Princess-Square 10x10mm Cubic Zirconia Hand Cut
Otto FreiTake advantage of exceptional closeout pricing on these 10x10mm Black Princess-Square Cubic Zirconia stones. Sourced from a large closeout lot, the...
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