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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Marquise Faceted Genuine Aquamarine
Otto FreiAquamarine is derived from the Latin word for "sea water," displaying a cool blue that ranges from greenish blue to blue-green. Part of the Beryl f...
View full detailsOval Faceted Genuine Aquamarine
Otto FreiAquamarine takes its name from the Latin word for "sea water," displaying a cool blue that ranges from greenish blue to blue-green. These oval face...
View full detailsPear Faceted Genuine Amethyst
Otto FreiAmethyst is the most popular and valuable stone in the quartz family, prized for its rich purple color that ranges from light lavender to medium-da...
View full detailsMarquise Faceted Genuine Amethyst
Otto FreiAmethyst has captivated gem enthusiasts and jewelers for centuries. Early Greeks believed the stone's deep purple hue could ward off intoxication —...
View full detailsRound Red Coral Cabochon
Otto FreiCoral is an organic gem, composed of the external skeletons of coral polyps. Formed from calcium carbonate with no crystal structure, coral has bee...
View full detailsOval Angel Skin Coral Cabochon
Otto FreiCoral is an organic gem composed of the external skeletons of coral polyps. Unlike mineral gemstones, coral has no crystal structure and is made of...
View full detailsHalf-drilled Lapis Lazuli Tear Drop Pair, High Quality
Otto FreiLapis Lazuli has been mined in the mountains of Afghanistan for more than 6,000 years. In fact, these mountains are home to the world's oldest know...
View full detailsOval Genuine Blue Sapphire Cabochon
Otto FreiSapphire is one of the most popular colored stones in the United States, prized for its extraordinary durability and suitability for everyday wear....
View full detailsOval Genuine Emerald Cabochon
Otto FreiEmerald is considered the world's finest green gemstone and has been highly prized and coveted for centuries, from Cleopatra to European royalty. E...
View full detailsOval Genuine Iolite Cabochon
Otto FreiIolite takes its name from the Greek word for violet, and the color delivers on that promise with a vivid violet-blue hue that catches the eye imme...
View full detailsRound Genuine Iolite Cabochon
Otto FreiIolite is derived from the Greek word for violet, displaying a vivid violet-blue color. These round genuine iolite cabochons are strongly pleochroi...
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 detailsOval Genuine Ruby Cabochon
Otto FreiKnown as the King of Gems in Sanskrit, ruby is one of the most desired and valuable gemstones, prized as far back as biblical times. Ruby is the mo...
View full detailsPear Tiger's-Eye Cabochon
Otto FreiTiger's Eye is part of the quartz family and a consistently popular gem for jewelry making—readily available, inexpensive, and durable enough for e...
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 Rutilated Quartz Cabochon
Otto FreiOval Rutilated Quartz cabochons offer a striking combination of natural clarity and the distinctive needle-like inclusions of rutile that give this...
View full detailsOval Genuine Red Aventurine Cabochon
Otto FreiOval genuine red aventurine cabochons are a striking choice for jewelers and metalsmiths seeking a natural stone with rich color and sparkling visu...
View full detailsOval Genuine Azurite Cabochon
Otto FreiAzurite Malachite is rarely found in calibrated sizes due to the unique nature of the stone and its distinctive green and blue coloration. This mat...
View full detailsRound Genuine Blue Sapphire Cabochon
Otto FreiSapphire is one of the most popular colored stones in the United States, prized for its extraordinary durability and suitability for everyday wear....
View full detailsMarquise Genuine Opal Cabochon
Otto FreiOpal is the world's most popular phenomenal gemstone, with many cultures believing that opals have supernatural origins and power. Inside each opal...
View full detailsRound Faceted Cubic Zirconia-Large Sizes 8.5mm to 18.0mm
Otto FreiCubic Zirconia is a man-made gemstone that serves as an affordable alternative to precious gemstones and is suitable for everyday wear. These large...
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 detailsHeart Faceted Imitation Aquamarine
Otto FreiSimulating the light sky blue of aquamarine, these heart-shaped faceted stones are composed of lab-created blue spinel. Designed as an aquamarine s...
View full detailsHeart Tiger's-Eye Cabochon
Otto FreiTiger's Eye is a member of the quartz family and one of the top-selling gemstones among jewelers and metalsmiths. Its enduring popularity stems fro...
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...
View full detailsRound Moissanite 4.5mm
Otto FreiMoissanite is an exceptional gemstone known for its extraordinary optical properties. All moissanite used in the jewelry industry is synthetic mate...
View full detailsCloseout Pack of 20 Trillion Cut Corner 9x9mm Cubic Zirconia
Otto FreiPack of 20 Trillion Cut Corner 9×9mm Cubic Zirconia (CZ) — B quality, hand-cut colorless stones offered at closeout pricing while supplies last. Th...
View full detailsOval Genuine 8mm x 6mm Muonionalusta Meteorite Cabochon
Otto FreiThe Muonionalusta Meteorite is a rare iron meteorite that fell to Earth over one million years ago, originating from the core of a celestial body. ...
View full detailsOval Genuine 10mm x 8mm Muonionalusta Meteorite Cabochon
Otto FreiThe Muonionalusta Meteorite Cabochon is a rare and extraordinary gemstone material sourced from one of the oldest known meteorites on Earth. This i...
View full detailsOval Genuine 12mm x 10mm Muonionalusta Meteorite Cabochon
Otto FreiThe Muonionalusta Meteorite is a rare iron meteorite that fell to Earth over one million years ago, originating from the core of a celestial body. ...
View full detailsOval Genuine 14mm x 10mm Muonionalusta Meteorite Cabochon
Otto FreiThe Muonionalusta Meteorite is a rare iron meteorite that fell to Earth over one million years ago, originating from the core of a celestial body. ...
View full detailsOval Genuine 16mm x 12mm Muonionalusta Meteorite Cabochon
Otto FreiThe Muonionalusta Meteorite Cabochon is a rare and remarkable gemstone material sourced from one of Earth's oldest known meteorite strikes. This ir...
View full detailsCloseout Aletai Etched Meteorite-10 Gram Pack
Otto FreiThe Aletai Meteorite is a genuine iron meteorite from the IIIE group, originating from Xinjiang, China. Each piece offers a rare glimpse into the f...
View full detailsCloseout Aletai Etched Meteorite-12 Gram Packs
Otto FreiBring the cosmos into your work with genuine Aletai Etched Meteorite, sold in packs of 3 stones totaling approximately 12 grams. Sourced from the A...
View full detailsCloseout Round Faceted 5.5mm Mahenge Garnet
Otto FreiMahenge Garnet is a rare and vibrant variety of garnet, prized for its exceptional pink champagne hue. Like all garnets, it belongs to a group of c...
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