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Master Alloys

Master alloys are the metal you combine with fine gold or fine silver to reach a working karat or .925 sterling. None of them contains gold. Otto Frei stocks yellow, white, and pink rose alloys for investment casting and for fabrication, several formulated for stone in place work, plus copper and brass casting grain and a manganese bronze casting alloy. Most are sold by the troy ounce, 20 pennyweights.

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2 Ounce Pack-Re-Cast-It Gold Alloy Refresher-Replenisher

Otto Frei
Part # 122.607
Original price $0.00 - Original price $0.00
Original price $0.00
$26.75
$26.75 - $26.75
Current price $26.75

Put old or scrap yellow gold back in the crucible and pull a bright, clean casting out of it. Re-Cast-It is an alloy additive designed for recastin...

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Original price $0.00 - Original price $0.00
Original price $0.00
$26.75
$26.75 - $26.75
Current price $26.75

Dark Yellow 9-14 Investment Casting Master Alloy For Stone In Place Casting-Per Troy Ounce (20 DWT)

Otto Frei
Part # 846-128
Original price $0.00 - Original price $0.00
Original price $0.00
$26.90
$26.90 - $26.90
Current price $26.90

This Dark Yellow Investment Casting Master Alloy is formulated for alloying with pure gold to produce 9K to 14K casting alloy, with specific perfor...

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Original price $0.00 - Original price $0.00
Original price $0.00
$26.90
$26.90 - $26.90
Current price $26.90

Standard Yellow 9-14 Investment Casting Master Alloy-Per Troy Ounce (20DWT)

Otto Frei
Part # 846-132
Original price $0.00 - Original price $0.00
Original price $0.00
$26.75
$26.75 - $26.75
Current price $26.75

A reliable, professional-grade investment casting master alloy formulated to produce a darker yellow tone ideal for 10K–14K gold alloying. This all...

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Original price $0.00 - Original price $0.00
Original price $0.00
$26.75
$26.75 - $26.75
Current price $26.75

Rich Yellow 18-22 Investment Casting & Fabricating Master Alloy-Suitable for Granulation-Per Troy Ounce (20DWT)

Otto Frei
Part # 846-175ND
Original price $0.00 - Original price $0.00
Original price $0.00
$91.30
$91.30 - $91.30
Current price $91.30

This rich, deep yellow master alloy is specially formulated for jewelers working in 18K–22K gold fabrication and investment casting. Designed with ...

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Original price $0.00 - Original price $0.00
Original price $0.00
$91.30
$91.30 - $91.30
Current price $91.30

Rich Yellow 18-22 Investment Casting Master Alloy-Per Troy Ounce (20DWT)

Otto Frei
Part # 846-175
Original price $0.00 - Original price $0.00
Original price $0.00
$72.98
$72.98 - $72.98
Current price $72.98

Rich Yellow 18–22 Investment Casting Master Alloy delivers a deep, rich yellow color in the classic European style. Featuring a smooth surface and ...

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Original price $0.00 - Original price $0.00
Original price $0.00
$72.98
$72.98 - $72.98
Current price $72.98

Rich Yellow 9-14 Investment Casting Stone-In-Place-Master Alloy-Per Troy Ounce (20DWT)

Otto Frei
Part # 846-158
Original price $0.00 - Original price $0.00
Original price $0.00
$39.80
$39.80 - $39.80
Current price $39.80

Rich Yellow Stone-in-Place Investment Casting Master Alloy is formulated for jewelers who require a high-reusability, tarnish-resistant alloy suita...

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Original price $0.00 - Original price $0.00
Original price $0.00
$39.80
$39.80 - $39.80
Current price $39.80

Light Yellow 9-14 Investment Casting Master Alloy-Per Troy Ounce (20DWT)

Otto Frei
Part # 846-134
Original price $0.00 - Original price $0.00
Original price $0.00
$30.75
$30.75 - $30.75
Current price $30.75

A popular all-around investment casting master alloy formulated for producing 9–14k gold. This alloy contains more silver than comparable formulati...

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Original price $0.00 - Original price $0.00
Original price $0.00
$30.75
$30.75 - $30.75
Current price $30.75

Standard Yellow 14-18 Fabrication & Enameling Master Alloy-No Zinc

Otto Frei
Part # 846-180
Original price $0.00 - Original price $0.00
Original price $0.00
$86.65
$86.65 - $86.65
Current price $86.65

This standard yellow master alloy is formulated for 14K and 18K gold fabrication and for glass enameling applications. Because it contains no zinc,...

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Original price $0.00 - Original price $0.00
Original price $0.00
$86.65
$86.65 - $86.65
Current price $86.65

Green Yellow 9-18 Investment Casting Master Alloy Per Troy Ounce

Otto Frei
Part # 846-184
Original price $0.00 - Original price $0.00
Original price $0.00
$119.00
$119.00 - $119.00
Current price $119.00

This master alloy produces a distinctive green-yellow shade of gold thanks to its very high silver content. Formulated for investment casting, it d...

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Original price $0.00 - Original price $0.00
Original price $0.00
$119.00
$119.00 - $119.00
Current price $119.00

Brass Casting Grain-Sold by the Troy Ounce

Otto Frei
Part # 846-91
Original price $0.00 - Original price $0.00
Original price $0.00
$5.31
$5.31 - $5.31
Current price $5.31

An ideal choice for sample lines and production casting, this brass casting grain is a clean two-component alloy of copper and zinc — nothing else....

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Original price $0.00 - Original price $0.00
Original price $0.00
$5.31
$5.31 - $5.31
Current price $5.31

Copper Casting Grain

Otto Frei
Part # 846-90
Original price $0.00 - Original price $0.00
Original price $0.00
$4.10
$4.10 - $4.10
Current price $4.10

This hard-to-find .999 pure copper casting grain is used for alloying with gold and silver. High-purity copper ensures consistent, repeatable resul...

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Original price $0.00 - Original price $0.00
Original price $0.00
$4.10
$4.10 - $4.10
Current price $4.10

Ultra White 9-18 Investment Casting Master Alloy

Otto Frei
Part # 846-140
Original price $0.00 - Original price $0.00
Original price $0.00
$9.35
$9.35 - $9.35
Current price $9.35

The Ultra White 9–18 Investment Casting Master Alloy is a nickel-based white gold master alloy formulated for investment casting and fabrication ap...

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Original price $0.00 - Original price $0.00
Original price $0.00
$9.35
$9.35 - $9.35
Current price $9.35

Ultra White 14-18 Fabrication Master Alloy Per Troy Ounce

Otto Frei
Part # 846-141
Original price $0.00 - Original price $0.00
Original price $0.00
$10.73
$10.73 - $10.73
Current price $10.73

Ultra White is a nickel-based fabrication master alloy designed for making 14K and 18K white gold alloys. It offers high tensile strength and conta...

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Original price $0.00 - Original price $0.00
Original price $0.00
$10.73
$10.73 - $10.73
Current price $10.73

Ultra White For Making 10-18 White Multi-Purpose Alloy-Per Troy Ounce (20 DWT)

Otto Frei
Part # 846-103
Original price $0.00 - Original price $0.00
Original price $0.00
$8.50
$8.50 - $8.50
Current price $8.50

This ultra white fabrication alloy is nickel-based and contains no gold and no silver. Designed as a multi-purpose master alloy for both casting an...

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Original price $0.00 - Original price $0.00
Original price $0.00
$8.50
$8.50 - $8.50
Current price $8.50

White 9-18 Investment Casting Master Alloy-Per Troy Ounce (20DWT)

Otto Frei
Part # 846-100
Original price $0.00 - Original price $0.00
Original price $0.00
$7.74
$7.74 - $7.74
Current price $7.74

This nickel-based white master alloy — previously called White Century — is formulated for investment casting and fabrication of 9K–18K white gold....

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Original price $0.00 - Original price $0.00
Original price $0.00
$7.74
$7.74 - $7.74
Current price $7.74

Dark Pink Rose 9-18K Fabrication Rolling Master Alloy-Per Troy Ounce (20DWT)

Otto Frei
Part # 846-151ND
Original price $0.00 - Original price $0.00
Original price $0.00
$19.75
$19.75 - $19.75
Current price $19.75

Copper gives rose and pink gold alloys their characteristic warm hue, but it also reduces workability — making setting and fabrication more challen...

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Original price $0.00 - Original price $0.00
Original price $0.00
$19.75
$19.75 - $19.75
Current price $19.75

Dark Pink-Rose 9-18 All Purpose Master Alloy-Sold By the Troy Ounce (20DWT)

Otto Frei
Part # 846-150
Original price $0.00 - Original price $0.00
Original price $0.00
$17.95
$17.95 - $17.95
Current price $17.95

The Dark Pink-Rose 9–18 All Purpose Master Alloy is a professional-grade casting and fabrication alloy designed for jewelers working across a wide ...

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Original price $0.00 - Original price $0.00
Original price $0.00
$17.95
$17.95 - $17.95
Current price $17.95

Pink Solder Alloys-For Making 18K Pink Solder-Easy, Medium & Hard

Otto Frei
Part # Varies
Original price $21.40 - Original price $24.20
Original price
$21.40 - $24.20
$21.40 - $24.20
Current price $21.40

These solder alloys are formulated to allow jewelers to make their own 18K pink solder in-house. These alloys contain no gold. To achieve 18K gold,...

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Original price $21.40 - Original price $24.20
Original price
$21.40 - $24.20
$21.40 - $24.20
Current price $21.40

Manganese Bronze Casting Alloy by the Pound

Otto Frei
Part # 143.301
Original price $0.00 - Original price $0.00
Original price $0.00
$28.50
$28.50 - $28.50
Current price $28.50

Jewelers Manganese Bronze is a casting alloy developed to provide jewelry casters with a base metal suitable for both centrifugal and vacuum castin...

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Original price $0.00 - Original price $0.00
Original price $0.00
$28.50
$28.50 - $28.50
Current price $28.50

Ultra Rich Reddish Yellow 9-14 Investment Casting Stone In Place Master Alloy-Contains No Gold Per Troy Ounce (20 DWT)

Otto Frei
Part # 846-101U
Original price $39.50 - Original price $39.50
Original price
$39.50
$39.50 - $39.50
Current price $39.50

The Ultra Rich Reddish Yellow Master Alloy is a high-performance investment casting alloy engineered for stone-in-place casting applications. Part ...

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Original price $39.50 - Original price $39.50
Original price
$39.50
$39.50 - $39.50
Current price $39.50

Bright Yellow 9-14 Investment Casting Master Alloy-Contains No Gold Per Troy Ounce (20 DWT)

Otto Frei
Part # 846-200
Original price $0.00 - Original price $0.00
Original price $0.00
$24.20
$24.20 - $24.20
Current price $24.20

This bright yellow master alloy is formulated for investment casting and open torch melting, producing a vivid yellow color when alloyed with fine ...

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Original price $0.00 - Original price $0.00
Original price $0.00
$24.20
$24.20 - $24.20
Current price $24.20

European Greenish Yellow 9-14 Investment Casting Master Alloy-Contains No Gold Per Troy Ounce (20 DWT)

Otto Frei
Part # 846-264
Original price $0.00 - Original price $0.00
Original price $0.00
$46.50
$46.50 - $46.50
Current price $46.50

This European-shade master alloy is formulated for investment casting and delivers a distinctive greenish yellow color when alloyed with fine gold ...

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Original price $0.00 - Original price $0.00
Original price $0.00
$46.50
$46.50 - $46.50
Current price $46.50

Deep Yellow 18 Casting Master Alloy-Sold Per Troy Ounce (20DWT)

Otto Frei
Part # 846-790
Original price $0.00 - Original price $0.00
Original price $0.00
$65.30
$65.30 - $65.30
Current price $65.30

The Deep Yellow 790 Casting Master Alloy delivers a deep, rich yellow color with a European style finish. Formulated specifically as an 18K casting...

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Original price $0.00 - Original price $0.00
Original price $0.00
$65.30
$65.30 - $65.30
Current price $65.30
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Greenish Yellow 18 Casting Master Alloy-Per Troy Ounce (20DWT)

Otto Frei
Part # 846-760
Original price $0.00 - Original price $0.00
Original price $0.00
$103.66
$103.66 - $103.66
Current price $103.66

This Greenish Yellow 18K Casting Master Alloy delivers a distinctive European-style greenish yellow color with the highest silver content of all 18...

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Original price $0.00 - Original price $0.00
Original price $0.00
$103.66
$103.66 - $103.66
Current price $103.66

Premium Pink 9-14 Casting Master Alloy-Sold Per Troy Ounce (20DWT)

Otto Frei
Part # 846-540
Original price $0.00 - Original price $0.00
Original price $0.00
$16.40
$16.40 - $16.40
Current price $16.40

Premium Pink 9–14K Casting Master Alloy is formulated for jewelers and casters who demand a rich, consistent pink color result in gold alloys rangi...

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Original price $0.00 - Original price $0.00
Original price $0.00
$16.40
$16.40 - $16.40
Current price $16.40

All Purpose Pink 9-18 Casting/Fabricating Master Alloy-Sold Per Troy Ounce (20DWT)

Otto Frei
Part # 846-548
Original price $0.00 - Original price $0.00
Original price $0.00
$16.95
$16.95 - $16.95
Current price $16.95

All Purpose Pink 9–18 Casting & Fabricating Master Alloy is a versatile master alloy formulated to cover a wide range of duties in both casting...

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Original price $0.00 - Original price $0.00
Original price $0.00
$16.95
$16.95 - $16.95
Current price $16.95

Sterling-Classic White Alloy

Otto Frei
Part # 846-588
Original price $0.00 - Original price $0.00
Original price $0.00
$8.54
$8.54 - $8.54
Current price $8.54

A general-purpose master alloy for alloying with pure silver to produce .925 sterling silver. Sterling-Classic White Alloy delivers a classic white...

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Original price $0.00 - Original price $0.00
Original price $0.00
$8.54
$8.54 - $8.54
Current price $8.54

Sterling-Super White Alloy

Otto Frei
Part # 846-597N
Original price $0.00 - Original price $0.00
Original price $0.00
$11.74
$11.74 - $11.74
Current price $11.74

Sterling-Super White Alloy is a general-purpose master alloy designed for alloying with pure silver to produce .925 sterling silver. Suitable for b...

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Original price $0.00 - Original price $0.00
Original price $0.00
$11.74
$11.74 - $11.74
Current price $11.74
Sold out

Ultra White 9K-18K Stone-In-Place Nickel Alloy

Otto Frei
Part # 846-982
Original price $0.00 - Original price $0.00
Original price $0.00
$39.05
$39.05 - $39.05
Current price $39.05

Ultra White 9K–18K Stone-In-Place Investment Casting Master Alloy is formulated for excellent fluidity during casting and fabrication applications....

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Original price $0.00 - Original price $0.00
Original price $0.00
$39.05
$39.05 - $39.05
Current price $39.05

Premium White 9-18 Silicon Free Casting Master Alloy-Per Troy Ounce (20DWT)

Otto Frei
Part # 846-900
Original price $0.00 - Original price $0.00
Original price $0.00
$8.60
$8.60 - $8.60
Current price $8.60

Premium White 9–18 Silicon Free Casting Master Alloy is a professional-grade white gold master alloy formulated for both casting and fabrication ap...

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Original price $0.00 - Original price $0.00
Original price $0.00
$8.60
$8.60 - $8.60
Current price $8.60