Skip to content

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

10+ Supplies & Gravers, Get 12% Off

Pear Faceted Imitation Citrine

Otto Frei
Part # Varies
Original price $9.50 - Original price $14.75
Original price
$9.50 - $14.75
$9.50 - $14.75
Current price $9.50

Displaying the rich golden yellow of citrine, these pear faceted imitation citrine stones are composed of lab-created synthetic yellow corundum. Wi...

View full details
Original price $9.50 - Original price $14.75
Original price
$9.50 - $14.75
$9.50 - $14.75
Current price $9.50
10+ Supplies & Gravers, Get 12% Off

Pear Faceted Imitation Pink Tourmaline

Otto Frei
Part # Varies
Original price $2.40 - Original price $6.50
Original price
$2.40 - $6.50
$2.40 - $6.50
Current price $2.40

This Pink Tourmaline simulant is crafted from lab-created synthetic pink corundum, offering a rich rose pink hue that closely replicates the appear...

View full details
Original price $2.40 - Original price $6.50
Original price
$2.40 - $6.50
$2.40 - $6.50
Current price $2.40
10+ Supplies & Gravers, Get 12% Off

Heart Faceted Imitation Sapphire

Otto Frei
Part # 916-918
Original price $3.36 - Original price $3.36
Original price
$3.36
$3.36 - $3.36
Current price $3.36

Mimicking the royal blue color of natural sapphire, this heart-shaped faceted stone is composed of lab-created blue spinel. Offered as a sapphire s...

View full details
Original price $3.36 - Original price $3.36
Original price
$3.36
$3.36 - $3.36
Current price $3.36
10+ Supplies & Gravers, Get 12% Off

Heart Faceted Imitation Peridot

Otto Frei
Part # Varies
Original price $7.50 - Original price $11.65
Original price
$7.50 - $11.65
$7.50 - $11.65
Current price $7.50

Displaying the characteristic lime-green color of peridot, these heart-faceted imitation peridot stones are crafted as a lab-created yellow-green s...

View full details
Original price $7.50 - Original price $11.65
Original price
$7.50 - $11.65
$7.50 - $11.65
Current price $7.50
10+ Supplies & Gravers, Get 12% Off

Emerald Cut Faceted Imitation Peridot

Otto Frei
Part # Varies
Original price $8.49 - Original price $22.92
Original price
$8.49 - $22.92
$8.49 - $22.92
Current price $8.49

Displaying the characteristic lime-green color of natural peridot, these emerald cut faceted imitation stones are crafted as a peridot simulant usi...

View full details
Original price $8.49 - Original price $22.92
Original price
$8.49 - $22.92
$8.49 - $22.92
Current price $8.49
10+ Supplies & Gravers, Get 12% Off

Square Faceted Imitation Emerald

Otto Frei
Part # Varies
Original price $3.50 - Original price $4.50
Original price
$3.50 - $4.50
$3.50 - $4.50
Current price $3.50

Displaying a rich emerald green, this Synthetic Spinel doublet is ideal as a May birthstone simulant. Each stone is composed of two layers of Synth...

View full details
Original price $3.50 - Original price $4.50
Original price
$3.50 - $4.50
$3.50 - $4.50
Current price $3.50
10+ Supplies & Gravers, Get 12% Off

Oval Red Coral Cabochon

Otto Frei
Part # Varies
Original price $7.00 - Original price $76.00
Original price
$7.00 - $76.00
$7.00 - $76.00
Current price $7.00

Coral 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 details
Original price $7.00 - Original price $76.00
Original price
$7.00 - $76.00
$7.00 - $76.00
Current price $7.00
10+ Supplies & Gravers, Get 12% Off

Oval Genuine 14x10mm Nephrite Jade Cabochon

Otto Frei
Part # 928-NJ141
Original price $0.00 - Original price $0.00
Original price $0.00
$20.25
$20.25 - $20.25
Current price $20.25

Oval Genuine 14x10mm Nephrite Jade Cabochon is a natural gemstone cabochon suited for professional jewelers, metalsmiths, and designers seeking a c...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$20.25
$20.25 - $20.25
Current price $20.25
10+ Supplies & Gravers, Get 12% Off

Oval Genuine 12x10mm Nephrite Jade Cabochon

Otto Frei
Part # 928-NJ121
Original price $0.00 - Original price $0.00
Original price $0.00
$18.75
$18.75 - $18.75
Current price $18.75

Oval Genuine 12x10mm Nephrite Jade Cabochon is a natural stone cabochon cut to a classic oval profile, ideal for setting in rings, pendants, brooch...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$18.75
$18.75 - $18.75
Current price $18.75
10+ Supplies & Gravers, Get 12% Off

Oval Genuine 11x9mm Nephrite Jade Cabochon

Otto Frei
Part # 928-NJ119
Original price $0.00 - Original price $0.00
Original price $0.00
$16.50
$16.50 - $16.50
Current price $16.50

Oval Genuine 11x9mm Nephrite Jade Cabochon brings the rich, earthy character of authentic nephrite jade to your jewelry designs. Each cabochon feat...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$16.50
$16.50 - $16.50
Current price $16.50
10+ Supplies & Gravers, Get 12% Off

Oval Genuine 10x8mm Nephrite Jade Cabochon

Otto Frei
Part # 928-NJ108
Original price $0.00 - Original price $0.00
Original price $0.00
$15.00
$15.00 - $15.00
Current price $15.00

Oval Genuine 10x8mm Nephrite Jade Cabochon is a natural stone cabochon ideal for setting into rings, pendants, brooches, and other fine jewelry pro...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$15.00
$15.00 - $15.00
Current price $15.00
10+ Supplies & Gravers, Get 12% Off

Oval Genuine 9x7mm Nephrite Jade Cabochon

Otto Frei
Part # 928-NJ97
Original price $0.00 - Original price $0.00
Original price $0.00
$13.50
$13.50 - $13.50
Current price $13.50

Oval Genuine 9x7mm Nephrite Jade Cabochon is a classic cut stone for jewelers and metalsmiths seeking a natural, ready-to-set gem. Each cabochon fe...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$13.50
$13.50 - $13.50
Current price $13.50
10+ Supplies & Gravers, Get 12% Off

Round Genuine 8mm Nephrite Jade Cabochon

Otto Frei
Part # 928-RNJ08
Original price $0.00 - Original price $0.00
Original price $0.00
$12.00
$12.00 - $12.00
Current price $12.00

Round 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 details
Original price $0.00 - Original price $0.00
Original price $0.00
$12.00
$12.00 - $12.00
Current price $12.00
10+ Supplies & Gravers, Get 12% Off

Todd Reed 3mm Round Diamond Cabochon

Otto Frei
Part # 985-535
Original price $0.00 - Original price $0.00
Original price $0.00
$115.00
$115.00 - $115.00
Current price $115.00

Sold by the piece. We are delighted to carry Todd Reed patented Diamond Cabochons. Each cabochon is made in a die to create a beautifully polished ...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$115.00
$115.00 - $115.00
Current price $115.00
10+ Supplies & Gravers, Get 12% Off

Todd Reed 2.1mm Round Diamond Cabochon

Otto Frei
Part # 985-533
Original price $0.00 - Original price $0.00
Original price $0.00
$50.00
$50.00 - $50.00
Current price $50.00

Todd Reed patented Diamond Cabochons bring a distinctive, handcrafted character to fine jewelry design. Each cabochon is formed in a die to produce...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$50.00
$50.00 - $50.00
Current price $50.00
10+ Supplies & Gravers, Get 12% Off

Todd Reed 1.8mm Round Diamond Cabochon

Otto Frei
Part # 985-532
Original price $0.00 - Original price $0.00
Original price $0.00
$27.50
$27.50 - $27.50
Current price $27.50

Todd Reed patented Diamond Cabochons bring a distinctive, artisan-quality aesthetic to fine jewelry design. Each cabochon is formed in a die to pro...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$27.50
$27.50 - $27.50
Current price $27.50
10+ Supplies & Gravers, Get 12% Off

Todd Reed 1.6mm Round Diamond Cabochon

Otto Frei
Part # 985-531
Original price $0.00 - Original price $0.00
Original price $0.00
$20.00
$20.00 - $20.00
Current price $20.00

Todd Reed patented Diamond Cabochons bring a distinctive, handcrafted character to fine jewelry work. Each cabochon is formed in a die to produce a...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$20.00
$20.00 - $20.00
Current price $20.00
10+ Supplies & Gravers, Get 12% Off

Todd Reed 2.6mm Round Diamond Cabochon

Otto Frei
Part # 985-534
Original price $0.00 - Original price $0.00
Original price $0.00
$75.00
$75.00 - $75.00
Current price $75.00

Todd Reed Diamond Cabochons bring a distinctive, handcrafted character to fine jewelry design. Each cabochon measures 2.6mm round and is formed in ...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$75.00
$75.00 - $75.00
Current price $75.00
Sold out
Closeout: Sold As Is

Closeout Rock Deco 2ct Black Raw Diamonds

Otto Frei
Part # 976-022
Original price $750.00
Original price $750.00 - Original price $750.00
Original price $750.00
Current price $250.00
$250.00 - $250.00
Current price $250.00
List Price: $750.00

These 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 details
Original price $750.00
Original price $750.00 - Original price $750.00
Original price $750.00
Current price $250.00
$250.00 - $250.00
Current price $250.00
Closeout: Sold As Is

Closeout Pack of 50 White Heart 8 x 8mm Cubic Zirconia

Otto Frei
Part # 906-108
Original price $183.75
Original price $183.75 - Original price $183.75
Original price $183.75
Current price $25.00
$25.00 - $25.00
Current price $25.00
List Price: $183.75

Closeout Pack of 50 White Heart 8 x 8mm Cubic Zirconia — a great opportunity to stock up on hand-cut CZs at exceptional value. Sourced from a large...

View full details
Original price $183.75
Original price $183.75 - Original price $183.75
Original price $183.75
Current price $25.00
$25.00 - $25.00
Current price $25.00
10+ Supplies & Gravers, Get 12% Off

Oval Faceted Imitation Red Garnet

Otto Frei
Part # Varies
Original price $1.68 - Original price $17.00
Original price
$1.68 - $17.00
$1.68 - $17.00
Current price $1.68

Oval faceted garnet simulant stones made from lab-created corundum, cut to calibrated sizes for jewelry use. A deep, vivid red that reads clean and...

View full details
Original price $1.68 - Original price $17.00
Original price
$1.68 - $17.00
$1.68 - $17.00
Current price $1.68
10+ Supplies & Gravers, Get 12% Off

Pear Shape Moissanite - 12x8mm

Otto Frei
Part # 965-158
Original price $0.00 - Original price $0.00
Original price $0.00
$131.25
$131.25 - $131.25
Current price $131.25

Pear Shape Moissanite at 12x8mm offers exceptional optical performance for fine jewelry applications. All moissanite in the jewelry industry is syn...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$131.25
$131.25 - $131.25
Current price $131.25
10+ Supplies & Gravers, Get 12% Off

Pear Shape Moissanite - 10x7mm

Otto Frei
Part # 965-157
Original price $0.00 - Original price $0.00
Original price $0.00
$65.00
$65.00 - $65.00
Current price $65.00

This pear shape moissanite delivers exceptional optical performance, making it one of the most compelling diamond simulants available to profession...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$65.00
$65.00 - $65.00
Current price $65.00
10+ Supplies & Gravers, Get 12% Off

Pear Shape Moissanite - 9x6mm

Otto Frei
Part # 965-156
Original price $0.00 - Original price $0.00
Original price $0.00
$50.00
$50.00 - $50.00
Current price $50.00

Moissanite in the jewelry industry is entirely synthetic material. With one of the highest refractive indices and light dispersion ratings of any g...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$50.00
$50.00 - $50.00
Current price $50.00
10+ Supplies & Gravers, Get 12% Off

Brilliant Cushion Moissanite - 10x10mm

Otto Frei
Part # 965-140
Original price $0.00 - Original price $0.00
Original price $0.00
$120.00
$120.00 - $120.00
Current price $120.00

Brilliant Cushion Moissanite offers an exceptional combination of brilliance and fire, making it one of the most sought-after diamond simulants ava...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$120.00
$120.00 - $120.00
Current price $120.00
10+ Supplies & Gravers, Get 12% Off

Brilliant Cushion Moissanite - 9x9mm

Otto Frei
Part # 965-139
Original price $0.00 - Original price $0.00
Original price $0.00
$90.00
$90.00 - $90.00
Current price $90.00

This 9x9mm Brilliant Cushion Moissanite delivers exceptional optical performance with one of the highest refractive indexes and light dispersion ra...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$90.00
$90.00 - $90.00
Current price $90.00
10+ Supplies & Gravers, Get 12% Off

Brilliant Cushion Moissanite - 8x8mm

Otto Frei
Part # 965-138
Original price $0.00 - Original price $0.00
Original price $0.00
$80.00
$80.00 - $80.00
Current price $80.00

This Brilliant Cushion Moissanite measures 8x8mm and delivers exceptional optical performance for fine jewelry applications. All moissanite in the ...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$80.00
$80.00 - $80.00
Current price $80.00
10+ Supplies & Gravers, Get 12% Off

Round Moissanite - 10mm

Otto Frei
Part # 965-100
Original price $0.00 - Original price $0.00
Original price $0.00
$85.00
$85.00 - $85.00
Current price $85.00

Round Moissanite in 10mm offers exceptional optical performance for fine jewelry applications. All moissanite used in the jewelry industry is synth...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$85.00
$85.00 - $85.00
Current price $85.00
Sold out
10+ Supplies & Gravers, Get 12% Off

Diamond Melee 4mm SI

Otto Frei
Part # 970-040
Original price $0.00 - Original price $0.00
Original price $0.00
$330.00
$330.00 - $330.00
Current price $330.00

Sold individually. This 4mm SI Full Cut Round Diamond Melee is a premium accent stone ideal for adding brilliance around a center stone or creating...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$330.00
$330.00 - $330.00
Current price $330.00
Sold out
10+ Supplies & Gravers, Get 12% Off

Diamond Melee 3.5mm SI

Otto Frei
Part # 970-035
Original price $0.00 - Original price $0.00
Original price $0.00
$190.00
$190.00 - $190.00
Current price $190.00

A full cut round diamond melee sold individually, ideal for accent stone applications or standalone sparkle details. At 3.5mm, this stone offers a ...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$190.00
$190.00 - $190.00
Current price $190.00
Sold out
10+ Supplies & Gravers, Get 12% Off

Diamond Melee 3mm SI

Otto Frei
Part # 970-030
Original price $0.00 - Original price $0.00
Original price $0.00
$100.00
$100.00 - $100.00
Current price $100.00

A full cut round diamond melee sold individually, ideal for adding brilliant accent stones to a centerpiece or creating standalone sparkle in pavé,...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$100.00
$100.00 - $100.00
Current price $100.00
Sold out
10+ Supplies & Gravers, Get 12% Off

Round Created Diamond - 5.25mm

Otto Frei
Part # 97C-525
Original price $0.00 - Original price $0.00
Original price $0.00
$115.50
$115.50 - $115.50
Current price $115.50

A full-cut round created diamond in a 5.25mm diameter, offering a brilliant alternative to mined stones. Created via the CVD (Chemical Vapor Deposi...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$115.50
$115.50 - $115.50
Current price $115.50
Sold out
10+ Supplies & Gravers, Get 12% Off

Round Created Diamond - 5mm

Otto Frei
Part # 97C-500
Original price $0.00 - Original price $0.00
Original price $0.00
$95.00
$95.00 - $95.00
Current price $95.00

This 5mm full-cut created round diamond offers a brilliant alternative to mined diamonds, delivering comparable optical beauty with reduced environ...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$95.00
$95.00 - $95.00
Current price $95.00
Sold out
10+ Supplies & Gravers, Get 12% Off

Round Created Diamond - 4.5mm

Otto Frei
Part # 97C-450
Original price $0.00 - Original price $0.00
Original price $0.00
$73.50
$73.50 - $73.50
Current price $73.50

This 4.5mm full cut round created diamond offers a brilliant, faceted stone with the look and quality of a natural diamond at a lower cost and with...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$73.50
$73.50 - $73.50
Current price $73.50
Sold out
10+ Supplies & Gravers, Get 12% Off

Round Created Diamond - 4mm

Otto Frei
Part # 97C-400
Original price $0.00 - Original price $0.00
Original price $0.00
$49.90
$49.90 - $49.90
Current price $49.90

This 4mm full cut round diamond offers the brilliance and fire of a natural diamond at a lower cost and with reduced environmental impact. Produced...

View full details
Original price $0.00 - Original price $0.00
Original price $0.00
$49.90
$49.90 - $49.90
Current price $49.90
Closeout: Sold As Is

Rock Deco 3.5mm Diamond Pearls-Orange (N)

Otto Frei
Part # 977-035OR
Original price $160.00
Original price $160.00 - Original price $160.00
Original price $160.00
Current price $120.00
$120.00 - $120.00
Current price $120.00
List Price: $160.00

Let these diamonds roll! Rock Deco's 3.5mm Diamond Pearls are beautifully round spheres with a high polish, offering a distinctive organic appeal f...

View full details
Original price $160.00
Original price $160.00 - Original price $160.00
Original price $160.00
Current price $120.00
$120.00 - $120.00
Current price $120.00