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Gemstones

10+ Supplies & Gravers, Get 12% Off

Round Black Onyx Cabochon

Otto Frei
Part # Varies
Original price $0.90 - Original price $6.00
Original price
$0.90 - $6.00
$0.90 - $6.00
Current price $0.90

Black Onyx, also known as black agate, is dyed black chalcedony. Chalcedony is composed of tiny quartz crystals not visible to the naked eye. Natur...

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Original price $0.90 - Original price $6.00
Original price
$0.90 - $6.00
$0.90 - $6.00
Current price $0.90

Closeout Pack-15 Marquise 32x7mm Black Chalcedony Cabochon

Otto Frei
Part # 990-349
Original price $14.00
Original price $14.00 - Original price $14.00
Original price $14.00
Current price $10.00
$10.00 - $10.00
Current price $10.00
List Price: $14.00

Chalcedony is a cryptocrystalline form of quartz, composed of tiny crystals too small to see with the naked eye. Natural black chalcedony is except...

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Original price $14.00
Original price $14.00 - Original price $14.00
Original price $14.00
Current price $10.00
$10.00 - $10.00
Current price $10.00
10+ Supplies & Gravers, Get 12% Off

Oval Genuine Hematite Cabochon

Otto Frei
Part # Varies
Original price $1.80 - Original price $2.40
Original price
$1.80 - $2.40
$1.80 - $2.40
Current price $1.80

Hematite is composed of iron oxide and exhibits a distinctive shiny, metallic luster that sets it apart from other gemstones. A traditional favorit...

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Original price $1.80 - Original price $2.40
Original price
$1.80 - $2.40
$1.80 - $2.40
Current price $1.80
10+ Supplies & Gravers, Get 12% Off

Oval Black Onyx Cabochon

Otto Frei
Part # Varies
Original price $0.60 - Original price $8.00
Original price
$0.60 - $8.00
$0.60 - $8.00
Current price $0.60

Black 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 details
Original price $0.60 - Original price $8.00
Original price
$0.60 - $8.00
$0.60 - $8.00
Current price $0.60
10+ Supplies & Gravers, Get 12% Off

Round Genuine Hematite Cabochon

Otto Frei
Part # Varies
Original price $1.95 - Original price $2.25
Original price
$1.95 - $2.25
$1.95 - $2.25
Current price $1.95

Hematite is composed of iron oxide, exhibiting a shiny, metallic luster. A traditional favorite in men's jewelry, hematite has the highest density ...

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Original price $1.95 - Original price $2.25
Original price
$1.95 - $2.25
$1.95 - $2.25
Current price $1.95
10+ Supplies & Gravers, Get 12% Off

Oval Opal Triplet Cabochon

Otto Frei
Part # Varies
Original price $9.00 - Original price $95.00
Original price
$9.00 - $95.00
$9.00 - $95.00
Current price $9.00

Opal is the world's most popular phenomenal gemstone, with many cultures believing that opals have supernatural origins and power. These oval opal ...

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Original price $9.00 - Original price $95.00
Original price
$9.00 - $95.00
$9.00 - $95.00
Current price $9.00
10+ Supplies & Gravers, Get 12% Off

Oval Flat Top Double Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $3.48 - Original price $6.00
Original price
$3.48 - $6.00
$3.48 - $6.00
Current price $3.48

Black 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 details
Original price $3.48 - Original price $6.00
Original price
$3.48 - $6.00
$3.48 - $6.00
Current price $3.48
10+ Supplies & Gravers, Get 12% Off

Antique Buff Top Single Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $4.50 - Original price $6.00
Original price
$4.50 - $6.00
$4.50 - $6.00
Current price $4.50

Black 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 details
Original price $4.50 - Original price $6.00
Original price
$4.50 - $6.00
$4.50 - $6.00
Current price $4.50
10+ Supplies & Gravers, Get 12% Off

Antique Flat Top Single Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $7.00 - Original price $9.00
Original price
$7.00 - $9.00
$7.00 - $9.00
Current price $7.00

Black 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 details
Original price $7.00 - Original price $9.00
Original price
$7.00 - $9.00
$7.00 - $9.00
Current price $7.00
10+ Supplies & Gravers, Get 12% Off

Octagon Buff Top Double Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $3.48 - Original price $6.25
Original price
$3.48 - $6.25
$3.48 - $6.25
Current price $3.48

Black 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 details
Original price $3.48 - Original price $6.25
Original price
$3.48 - $6.25
$3.48 - $6.25
Current price $3.48
10+ Supplies & Gravers, Get 12% Off

Round Picture Jasper Cabochon

Otto Frei
Part # Varies
Original price $3.90 - Original price $5.25
Original price
$3.90 - $5.25
$3.90 - $5.25
Current price $3.90

Picture Jasper cabochons offer the natural beauty of an opaque chalcedony stone, prized for its tan base accented with brown and black dots, swirls...

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Original price $3.90 - Original price $5.25
Original price
$3.90 - $5.25
$3.90 - $5.25
Current price $3.90
10+ Supplies & Gravers, Get 12% Off

Round Opal Triplet Cabochon

Otto Frei
Part # Varies
Original price $12.80 - Original price $22.05
Original price
$12.80 - $22.05
$12.80 - $22.05
Current price $12.80

Opal is the world's most popular phenomenal gemstone, with many cultures believing that opals have supernatural origins and power. These Round Opal...

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Original price $12.80 - Original price $22.05
Original price
$12.80 - $22.05
$12.80 - $22.05
Current price $12.80
10+ Supplies & Gravers, Get 12% Off

Oval Buff Top Genuine Hematite Cabochon

Otto Frei
Part # Varies
Original price $1.32 - Original price $2.55
Original price
$1.32 - $2.55
$1.32 - $2.55
Current price $1.32

Hematite is composed of iron oxide, exhibiting a shiny, metallic luster that has made it a traditional favorite in men's jewelry. With the highest ...

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Original price $1.32 - Original price $2.55
Original price
$1.32 - $2.55
$1.32 - $2.55
Current price $1.32

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...

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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
10+ Supplies & Gravers, Get 12% Off

Druzy Quartz Black Oval 20mm x 15mm

Otto Frei
Part # 939-620
Original price $0.00 - Original price $0.00
Original price $0.00
$28.96
$28.96 - $28.96
Current price $28.96

Druzy Quartz adds a colorful, glittery texture to any jewelry at an affordable cost. The term "Druzy" refers to clusters of tiny crystals that form...

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Original price $0.00 - Original price $0.00
Original price $0.00
$28.96
$28.96 - $28.96
Current price $28.96
10+ Supplies & Gravers, Get 12% Off

Cushion Buff Top Genuine Hematite Cabochon

Otto Frei
Part # Varies
Original price $2.70 - Original price $5.25
Original price
$2.70 - $5.25
$2.70 - $5.25
Current price $2.70

Hematite is composed of iron oxide, exhibiting a shiny, metallic luster. A traditional favorite in men's jewelry, hematite has the highest density ...

View full details
Original price $2.70 - Original price $5.25
Original price
$2.70 - $5.25
$2.70 - $5.25
Current price $2.70
10+ Supplies & Gravers, Get 12% Off

Oval Flat Top Double Bevel Genuine Black Onyx With Hole

Otto Frei
Part # Varies
Original price $4.80 - Original price $5.10
Original price
$4.80 - $5.10
$4.80 - $5.10
Current price $4.80

Black 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 details
Original price $4.80 - Original price $5.10
Original price
$4.80 - $5.10
$4.80 - $5.10
Current price $4.80
10+ Supplies & Gravers, Get 12% Off

Oval Buff Top Double Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $4.50 - Original price $7.50
Original price
$4.50 - $7.50
$4.50 - $7.50
Current price $4.50

Black 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 details
Original price $4.50 - Original price $7.50
Original price
$4.50 - $7.50
$4.50 - $7.50
Current price $4.50
10+ Supplies & Gravers, Get 12% Off

Oval Buff Top Single Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $2.25 - Original price $6.00
Original price
$2.25 - $6.00
$2.25 - $6.00
Current price $2.25

Black 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 details
Original price $2.25 - Original price $6.00
Original price
$2.25 - $6.00
$2.25 - $6.00
Current price $2.25
10+ Supplies & Gravers, Get 12% Off

Octagon Flat Top Double Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $4.65 - Original price $9.00
Original price
$4.65 - $9.00
$4.65 - $9.00
Current price $4.65

Black 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 details
Original price $4.65 - Original price $9.00
Original price
$4.65 - $9.00
$4.65 - $9.00
Current price $4.65
10+ Supplies & Gravers, Get 12% Off

Octagon Flat Top Single Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $3.48 - Original price $7.00
Original price
$3.48 - $7.00
$3.48 - $7.00
Current price $3.48

Black 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 details
Original price $3.48 - Original price $7.00
Original price
$3.48 - $7.00
$3.48 - $7.00
Current price $3.48
10+ Supplies & Gravers, Get 12% Off

Octagon Buff Top Single Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $3.00 - Original price $6.90
Original price
$3.00 - $6.90
$3.00 - $6.90
Current price $3.00

Black 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...

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Original price $3.00 - Original price $6.90
Original price
$3.00 - $6.90
$3.00 - $6.90
Current price $3.00
10+ Supplies & Gravers, Get 12% Off

Cushion Flat Top Double Bevel Genuine Black Onyx With Hole

Otto Frei
Part # Varies
Original price $3.48 - Original price $6.25
Original price
$3.48 - $6.25
$3.48 - $6.25
Current price $3.48

Black 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 details
Original price $3.48 - Original price $6.25
Original price
$3.48 - $6.25
$3.48 - $6.25
Current price $3.48
10+ Supplies & Gravers, Get 12% Off

Cushion Flat Top Single Bevel Genuine Black Onyx With Hole

Otto Frei
Part # Varies
Original price $7.50 - Original price $9.50
Original price
$7.50 - $9.50
$7.50 - $9.50
Current price $7.50

Black 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 details
Original price $7.50 - Original price $9.50
Original price
$7.50 - $9.50
$7.50 - $9.50
Current price $7.50
10+ Supplies & Gravers, Get 12% Off

Cushion Buff Top Double Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $3.48 - Original price $5.25
Original price
$3.48 - $5.25
$3.48 - $5.25
Current price $3.48

Black 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 details
Original price $3.48 - Original price $5.25
Original price
$3.48 - $5.25
$3.48 - $5.25
Current price $3.48
10+ Supplies & Gravers, Get 12% Off

Cushion Buff Top Single Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $3.00 - Original price $5.25
Original price
$3.00 - $5.25
$3.00 - $5.25
Current price $3.00

Black 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 details
Original price $3.00 - Original price $5.25
Original price
$3.00 - $5.25
$3.00 - $5.25
Current price $3.00
10+ Supplies & Gravers, Get 12% Off

Antique Buff Top Double Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $3.90 - Original price $6.00
Original price
$3.90 - $6.00
$3.90 - $6.00
Current price $3.90

Black 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 details
Original price $3.90 - Original price $6.00
Original price
$3.90 - $6.00
$3.90 - $6.00
Current price $3.90
10+ Supplies & Gravers, Get 12% Off

Cushion Buff Top Double Bevel Genuine Black Onyx With Hole

Otto Frei
Part # Varies
Original price $5.32 - Original price $6.25
Original price
$5.32 - $6.25
$5.32 - $6.25
Current price $5.32

Black 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 details
Original price $5.32 - Original price $6.25
Original price
$5.32 - $6.25
$5.32 - $6.25
Current price $5.32
10+ Supplies & Gravers, Get 12% Off

Cushion Flat Top Single Bevel Genuine Black Onyx

Otto Frei
Part # Varies
Original price $6.00 - Original price $8.50
Original price
$6.00 - $8.50
$6.00 - $8.50
Current price $6.00

Black 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 details
Original price $6.00 - Original price $8.50
Original price
$6.00 - $8.50
$6.00 - $8.50
Current price $6.00
Sold out
10+ Supplies & Gravers, Get 12% Off

Cushion Buff Top Single Bevel Genuine Black Onyx With Hole

Otto Frei
Part # Varies
Original price $6.50 - Original price $7.50
Original price
$6.50 - $7.50
$6.50 - $7.50
Current price $6.50

Black 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 details
Original price $6.50 - Original price $7.50
Original price
$6.50 - $7.50
$6.50 - $7.50
Current price $6.50
Sold out
10+ Supplies & Gravers, Get 12% Off

Oval Buff Top Double Bevel Genuine Black Onyx With Hole

Otto Frei
Part # Varies
Original price $3.65 - Original price $5.50
Original price
$3.65 - $5.50
$3.65 - $5.50
Current price $3.65

Black 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 details
Original price $3.65 - Original price $5.50
Original price
$3.65 - $5.50
$3.65 - $5.50
Current price $3.65
10+ Supplies & Gravers, Get 12% Off

Marquise Opal Triplet Cabochon

Otto Frei
Part # Varies
Original price $21.00 - Original price $38.75
Original price
$21.00 - $38.75
$21.00 - $38.75
Current price $21.00

Opal is the world's most popular phenomenal gemstone, with many cultures believing that opals have supernatural origins and power. These Marquise O...

View full details
Original price $21.00 - Original price $38.75
Original price
$21.00 - $38.75
$21.00 - $38.75
Current price $21.00
10+ Supplies & Gravers, Get 12% Off

Antique Flat Top Double Bevel Genuine Black Onyx with Hole

Otto Frei
Part # 947-143
Original price $5.00 - Original price $5.00
Original price
$5.00
$5.00 - $5.00
Current price $5.00

Black 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 details
Original price $5.00 - Original price $5.00
Original price
$5.00
$5.00 - $5.00
Current price $5.00
10+ Supplies & Gravers, Get 12% Off

Oval Picture Jasper Cabochon

Otto Frei
Part # 9CB-OV-003-BR-1813
Original price $9.00 - Original price $9.00
Original price
$9.00
$9.00 - $9.00
Current price $9.00

Jasper 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 ...

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Original price $9.00 - Original price $9.00
Original price
$9.00
$9.00 - $9.00
Current price $9.00

Closeout Pack of 25 Black Princess-Square 7x7mm Cubic Zirconia Hand Cut

Otto Frei
Part # 920-807
Original price $50.00
Original price $50.00 - Original price $50.00
Original price $50.00
Current price $15.50
$15.50 - $15.50
Current price $15.50
List Price: $50.00

Pick up a pack of 25 black princess-square cubic zirconia stones at closeout pricing. These 7×7mm CZs are B-quality, hand-cut stones — a practical ...

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Original price $50.00
Original price $50.00 - Original price $50.00
Original price $50.00
Current price $15.50
$15.50 - $15.50
Current price $15.50
Sold out

Closeout Pack of 10 Black Princess-Square 9x9mm Cubic Zirconia Hand Cut

Otto Frei
Part # 920-809
Original price $40.00
Original price $40.00 - Original price $40.00
Original price $40.00
Current price $8.50
$8.50 - $8.50
Current price $8.50
List Price: $40.00

Take 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...

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Original price $40.00
Original price $40.00 - Original price $40.00
Original price $40.00
Current price $8.50
$8.50 - $8.50
Current price $8.50