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Round 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 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 detailsRound Faceted Genuine Amethyst
Otto Frei5.0 / 5.0
1 Review
Amethyst is the most popular and valuable member of the quartz family, prized for its distinctive purple, wine-like color. According to early Greek...
View full detailsRound 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. A member of the...
View full detailsRound Faceted Genuine Blue Sapphire
Otto Frei5.0 / 5.0
1 Review
Sapphire is one of the most popular colored gemstones in the United States, prized for its extraordinary durability and suitability for everyday we...
View full detailsRound Faceted Genuine Citrine
Otto Frei5.0 / 5.0
1 Review
Citrine ranges from transparent yellow to brownish orange in color and takes its name from citron, a fruit related to the lemon. Most citrine is pr...
View full detailsRound Faceted Genuine Emerald
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 detailsRound Faceted Genuine Garnet
Otto Frei5.0 / 5.0
1 Review
Garnet is a set of closely related minerals sharing the same crystal structure while varying in chemical composition. Red is the most common and ab...
View full detailsRound Faceted Genuine Iolite
Otto FreiIolite takes its name from the Greek word for violet, and it earns that distinction with a vivid violet-blue color that immediately draws the eye. ...
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 Faceted Genuine Pink Tourmaline
Otto FreiPink Tourmaline has been highly prized in the Chinese imperial court for centuries and is also known by the trade name Rubellite. Tourmaline is cel...
View full detailsRound Faceted Genuine Ruby
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 ...
View full detailsRound Faceted Genuine Sky Blue Topaz
Otto FreiSky Blue Topaz is the trade name used to describe a bright, light blue hue of topaz. This gem is a great alternative to aquamarine, offering more i...
View full detailsRound Faceted Genuine Smoky Quartz
Otto Frei5.0 / 5.0
1 Review
Smoky Quartz is a widely available and affordable genuine gemstone with a long history of popularity, particularly during the Victorian era. Often ...
View full detailsRound Faceted Genuine Swiss Blue Topaz
Otto FreiSwiss Blue Topaz is the trade name used to describe a vivid medium to medium-dark blue hue of topaz. This genuine faceted gemstone is a great alter...
View full detailsRound Faceted Genuine White Sapphire
Otto FreiWhite sapphire, also known as colorless sapphire or leucosapphire, is corundum in its purest form. Differing amounts and combinations of trace elem...
View full detailsRound Faceted Green Quartz
Otto FreiGreen Quartz — also known as Prasiolite and sold under the trade name Greened Amethyst — is a member of the Quartz family produced by heat-treating...
View full detailsRound Faceted Imitation Alexandrite, Synthetic Corundum (June)
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 Amethyst, Synthetic Spinel Doublet (February)
Otto FreiThis Round Faceted Imitation Amethyst is composed of a lab-created synthetic spinel doublet, exhibiting a light to medium purple color that mimics ...
View full detailsRound Faceted Imitation Aquamarine, Synthetic Spinel (March)
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 Blue Zircon, Synthetic Spinel (December)
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 Citrine, Synthetic Corundum (November)
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 Faceted Imitation Emerald, Synthetic Spinel Doublet and Nano Crystal (May)
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 Faceted Imitation Peridot, Synthetic Spinel Doublet (August)
Otto FreiThese round faceted imitation peridot stones display the characteristic lime-green color of natural peridot. Each stone is a lab-created yellow-gre...
View full detailsRound Faceted Imitation Pink Tourmaline, Synthetic Corundum (October)
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 Imitation Red Garnet, Synthetic Corundum (January)
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 detailsRound Faceted Imitation Sapphire, Synthetic Spinel (September)
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 detailsRound Faceted Lab-Created Emerald
Otto FreiComposed of man-made beryl with the same chemical composition as natural emerald, these round faceted lab-created emeralds offer excellent clarity ...
View full detailsRound Faceted Lab-Created Nano Crystal Emerald
Otto FreiDisplaying a rich, vivid emerald green, this nano crystal gemstone is ideal for the birthstone of May. With a Mohs hardness of 7 to 7½ and high res...
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 Faceted Morganite
Otto FreiMorganite is a captivating variety of the Beryl family — the same mineral group that includes Emerald and Aquamarine. Its color ranges from soft ro...
View full detailsRound Faceted Pink Amethyst
Otto FreiPink Amethyst, also known as Rose De France, is amethyst that displays a pale pink to lavender color. Part of the quartz family, amethyst is the mo...
View full detailsRound Faceted Tanzanite
Otto Frei2.0 / 5.0
1 Review
Tanzanite is found in only one location in the entire world — Tanzania, in Eastern Africa. Discovered in 1962, tanzanite is a relative newcomer to ...
View full detailsRound Genuine 8mm Nephrite Jade Cabochon
Otto FreiRound Genuine 8mm Nephrite Jade Cabochon offers jewelers and metalsmiths a classic, ready-to-set stone in one of the most enduring gem materials in...
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 ...
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