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.
Filters
Pack-100 Round Moissanite 1mm
Otto Frei5.0 / 5.0
1 Review
Moissanite is one of the most brilliant gemstone simulants available to the professional jeweler. In the jewelry industry, all moissanite is synthe...
View full detailsPack-10 Round Lab Grown Diamond-1mm
Otto FreiThis pack of 10 full cut round lab grown diamonds (1.0 mm) delivers precise, bright brilliance for fine accent work. Ideal for pavé, micro-pavé, ha...
View full detailsRound Cubic Zirconia-Sizes 1.0mm to 8.0mm
Otto FreiRound cubic zirconia stones in a wide size range, ideal for stone-setting practice, training benches, and finished jewelry where an economical diam...
View full detailsRound Faceted Lab-Created Ruby
Otto Frei4.33 / 5.0
3 Reviews
Composed of man-made corundum, this round faceted lab-created ruby shares the same chemical composition and durability as natural ruby. Known as th...
View full detailsRound Lab-Created Ruby Cabochon
Otto Frei5.0 / 5.0
1 Review
A vibrant, professional-grade gemstone for jewelry making and resale, this round lab-created ruby cabochon is composed of man-made corundum — shari...
View full detailsCloseout-Round Swarovski Gemstonesâ„¢ Genuine Ice Blue Topaz
Swarovski5.0 / 5.0
2 Reviews
Swarovski Gemsâ„¢ Genuine Ice Blue Topaz elevates natural topaz with two proprietary enhancements: the patented Natural Brilliance Cut and the TCF (T...
View full detailsRound Faceted Imitation Sapphire
Otto Frei5.0 / 5.0
1 Review
Mimicking the rich royal blue of natural sapphire, these round faceted imitation sapphires are composed of lab-created blue spinel. Designed as a s...
View full detailsRound Faceted Lab-Created Blue Sapphire
Otto Frei5.0 / 5.0
2 Reviews
Composed of man-made corundum with the same chemical composition and durability as natural sapphire, these round faceted lab-created blue sapphires...
View full detailsPack-3 Round Moissanite 3mm
Otto Frei5.0 / 5.0
2 Reviews
Moissanite is one of the most brilliant gemstone simulants available to the jewelry trade. With one of the highest refractive indexes and light dis...
View full detailsPack-10 Round Moissanite 2mm
Otto FreiMoissanite is an entirely synthetic material in the jewelry industry, prized for its exceptional optical properties. With one of the highest refrac...
View full detailsRound Faceted Imitation Alexandrite
Otto Frei5.0 / 5.0
1 Review
This Alexandrite simulant is crafted from lab-created synthetic purple corundum, displaying a distinctive greyish-purple hue. With a hardness ratin...
View full detailsRound Faceted Imitation Pink Tourmaline
Otto Frei5.0 / 5.0
1 Review
This Pink Tourmaline simulant is composed of lab-created synthetic pink corundum, displaying a beautiful rose pink hue that closely mimics the appe...
View full detailsRound Faceted Genuine Peridot
Otto Frei5.0 / 5.0
2 Reviews
Named by the Egyptians as the "gem of the sun," peridot is plentiful and generally inexpensive. Ranging from transparent yellowish green to greenis...
View full detailsRound Genuine Garnet Cabochon
Otto FreiGarnet belongs to a group of closely related minerals sharing the same crystal structure but varying chemical compositions. While garnet occurs in ...
View full detailsRound Labradorite Cabochon
Otto FreiWhen light hits labradorite, an iridescent shimmer of spectral colors — commonly blue and green — occurs, known as labradorescence. This optical ph...
View full detailsRound Carnelian Cabochon
Otto FreiCarnelian is part of the Chalcedony family, ranging from brownish orange to orange-red. Chalcedony is made of tiny crystals of quartz that are not ...
View full detailsCloseout Labradorite Cabochon - Oval
Otto FreiWhen light strikes this oval labradorite cabochon, an iridescent shimmer of spectral colors — commonly blue and green — dances across the surface i...
View full detailsRound Faceted Imitation Emerald
Otto FreiDisplaying a rich emerald green, these Round Faceted Imitation Emeralds are an ideal choice for May birthstone jewelry and custom gemstone work. Ea...
View full detailsRound Moissanite 4mm
Otto FreiRound Moissanite in 4mm offers jewelers and designers a premium synthetic gemstone with exceptional optical performance. All moissanite in the jewe...
View full detailsSquare Faceted Cubic Zirconia
Otto FreiCubic Zirconia is a man-made gemstone that is an affordable alternative to precious gemstones and suitable for everyday wear. Perfect for any state...
View full detailsRound Moissanite 5mm
Otto Frei5.0 / 5.0
1 Review
Moissanite has become one of the most sought-after diamond simulants in the jewelry industry — and for good reason. With one of the highest refract...
View full detailsPack-6 Round Moissanite 2.5mm
Otto FreiMoissanite has earned its place as the premier diamond simulant in the jewelry industry — and every stone in this pack demonstrates exactly why. Wi...
View full detailsOval Rose Quartz Cabochon
Otto FreiRose Quartz derives its name from its distinctive pastel pink appearance, ranging from very light to medium-dark pink. Known as the "love stone," t...
View full detailsOval Genuine Turquoise Cabochon (With Matrix)
Otto Frei3.0 / 5.0
1 Review
Turquoise has been a prized gemstone across many cultures and civilizations, including Ancient Egyptians and Native Americans. Revered for centurie...
View full detailsCloseout-Round Swarovski Gemstonesâ„¢ Genuine Pink Topaz
SwarovskiSwarovski Gemsâ„¢ Genuine Pink Topaz elevates the natural beauty of topaz through precision cutting and innovative color treatment. Each stone featur...
View full detailsEmerald Faceted Cubic Zirconia
Otto Frei5.0 / 5.0
1 Review
Emerald faceted cubic zirconia offers jewelers and metalsmiths a brilliant, affordable alternative to precious gemstones. These man-made stones del...
View full detailsCloseout-Round Swarovski Gemstonesâ„¢ Genuine Rainforest Green Topaz
SwarovskiSwarovski Gemsâ„¢ Genuine Rainforest Green Topaz elevates natural topaz through two proprietary innovations: the Natural Brilliance Cut and the TCF (...
View full detailsRound Faceted Imitation Citrine
Otto FreiThese Round Faceted Imitation Citrine stones display the rich golden yellow color characteristic of natural citrine. Composed of synthetic yellow c...
View full detailsRound Genuine Amethyst Cabochon
Otto FreiPrized since antiquity, amethyst carries one of the most storied histories in the gem world — early Greeks believed its rich purple hue could ward ...
View full detailsRound 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 detailsOval Green Moss Agate Cabochon
Otto FreiAgate is a type of chalcedony characterized by curved and angular bands of color that vary in hue and transparency. From patterns of lace, moss, an...
View full details3ct Tumbled Washed Raw Diamonds
Otto Frei5.0 / 5.0
2 Reviews
We cannot ship outside the USA. These diamonds have only been tumbled washed leaving a high gloss raw look. A few diamonds still slightly resemble...
View full detailsRound Faceted Chrome Diopside
Otto FreiChrome Diopside is an affordable, untreated alternative to Emerald, offering a rich green color at a fraction of the cost. Its vivid hue originates...
View full detailsRound Faceted Imitation Blue Zircon
Otto FreiThis lab-created blue Spinel delivers the rich ocean blue hue characteristic of zircon, without zircon's inherent brittleness. Composed of syntheti...
View full detailsRound Faceted Imitation Aquamarine
Otto FreiThese round faceted imitation aquamarine stones simulate the light sky blue color of natural aquamarine and are composed of lab-created blue spinel...
View full detailsRound Faceted Imitation Red Garnet
Otto Frei1.0 / 5.0
1 Review
This round faceted garnet simulant is composed of synthetic red corundum, delivering a deep, vivid red color that closely replicates the look of na...
View full details