precious metal testing
DESCRIPTION
Precious metal testing checks the purity of a sample, which determines its value. This presentation explains several different tests, or assays, that Manhattan Gold and Silver performs.TRANSCRIPT
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Precious Metal TestingPrecious Metal Testing
Assay Types for Gold and Assay Types for Gold and Other Other
Precious MetalsPrecious Metals
Manhattan Gold & Silver | 45 W 47th Street | New York, NY 10036 | 212-398-1454
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What PM Tests are ForWhat PM Tests are For• Before accepting gold, MGS (or any
precious metal refinery for that matter) must test or “assay” a sample.
• The assay determines the purity of the gold, which determines its value.
• Accurate precious metal assays are important for receiving a fair payout.
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The Difference Between The Difference Between TestsTests
• Different assays can yield different results depending on the skills of the assayer and the type of assay. – At MGS, we have been testing precious metal
samples for more than 25 years.
• There are three different assays that we can perform:– Hand Assay (aka Stone Test)– Machine Assay (aka X-Ray Fluorescence)– Fire Assay
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Hand AssayHand AssayA hand assay is the fastest way to test the purity of a gold sample. – Hand assays are fast and accurate enough to ensure fair
payments for walk-in patrons.
• To perform the test, the metal is scratched against a basalt stone, leaving a fine line.
• This line is treated with chemicals that will only react with certain purities of gold.
• By carefully observing the chemical reaction, the purity or authenticity of the sample can be determined.
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Machine AssayMachine Assay• A machine assay is a quick type of test that is extremely
accurate, even more so than a hand test. – Machine assays can be done onsite and are best for larger
batches of precious metal.
• This assay uses a machine to bombard a sample with x-rays.
• The sample reflects the x-rays back as light. This energy level of the light is specific to the metal’s atomic structure.
• The machine analyzes this energy level to determine the purity of the sample. – A machine assay is so thorough it can also measure the
percentage of impurities at the same time.
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Fire AssayFire Assay• A fire assay is the most accurate purity test, but it is also the most
complex. – MGS requires at least one day to perform a fire assay at our offsite melting
facility.
• First, the gold is melted together with lead oxide and control substances.– This causes everything to bind together.
• The resulting mixture is poured into a mold and cooled.– This causes the lead to sink to the bottom of the mold.
• The lead bottom is chipped off and melted in a cupel.
• The cupel absorbs all the lead, leaving only pure gold behind.– The amount of gold produced from the lead is measured against the overall
sample determine its purity.
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About MGSAbout MGS
Manhattan Gold & Silver | 45 W 47th Street | New York, NY 10036 | 212-398-1454
• Manhattan Gold & Silver (MGS) is a precious metals refiner that has been based in Manhattan’s historic Diamond District since 1985. We are a B2B company that buys and recycles precious metal scraps that accumulate in other businesses.
• We serve: – Jewelers– Pawnbrokers– Dentists– The industrial sector– Antique dealers– Machinists – And more!
• MGS also creates charts, calculators, and other online tools for our customers to use.
– Try our Precious Metals Prices app, which lets you monitor the real-time precious metals market situation from anywhere, right from your iPhone.
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Recycle your Precious Recycle your Precious Metals for ProfitMetals for Profit
• MGS accepts gold, silver, platinum, and palladium.
• Payouts are based on the London Fixing.
• Up to 98% payout (among the highest in the US)– Up to 98.5% for gold brought in for hand testing.
• Not in NYC? Ship us your precious metals using our Ship & Sell service. Ship & Sell offers:– Same day wired payment (once lot is received)– Discounted, insured shipping– Payout calculator
Manhattan Gold & Silver | 45 W 47th Street | New York, NY 10036 | 212-398-1454
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Connect with MGSConnect with MGS• For amazing facts, history, and news, read our
gold and precious metals blog.
• Join the conversation about precious metals on the MGS Facebook wall.
• Follow gold, silver, and other precious metal trends on the MGS Twitter account.
• Circle MGS on Google+ to hear about our latest updates, contests, and more.
• If you do business with us, connect with us on the MGS LinkedIn page.
• To see precious metal refinement in action, visit the MGS Youtube channel.
Manhattan Gold & Silver | 45 W 47th Street | New York, NY 10036 | 212-398-1454