Archive of GoldMoney Laboratory Reports

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Archive of GoldMoney laboratory reports about gold, and analysis from experts

Resonant inspection of precious metals

Introduction For measurements of certain properties of thin materials, such as the thickness or birefringence – having different velocities of sound depending on the polarisation of the sound waves – of sheets or plates, resonant mode excitation can be used[1]. This is often used in cases where the sample is too thin for ...

2012-SEP-24 · Dr Mark Potter

gold bars, gold coins, gold test

Ultrasonic inspection of precious metals

Conventional techniques for precious metal quality assessment Historically, inspection of gold quality has mostly involved chemical analysis to determine purity, using techniques such as fire assay[1]. But as this is a wholly destructive technique, there are obvious disadvantages. More recently minimally or non-destructive techniques ...

2012-JUL-16 · Dr Mark Potter

gold bars, gold test

Quality assessment of fine gold (part 2 of 2)

Modern methods of chemical analysis One should keep in mind that the required sampling for chemical analysis will always damage the inspected item. Though fire assay can be used to test alloyed coins and jewellery of lower finenesses as well, this essay is focused on the testing of pure gold with finenesses above 995. Traditional ...

2012-APR-30 · Martin Völker

gold bullion, gold test

Quality assessment of fine gold (part 1 of 2)

Quality assessment of fine gold (part 1 of 2) Introduction Gold quality designation Many countries have enacted consumer protection targeted regulations on quality and marking of precious metal goods. In addition, two internationally widely accepted regulations exist: “Good delivery Rules” from the London Bullion Market ...

2012-APR-30 · Martin Völker

gold bullion, gold test

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CURRENT PRECIOUS METAL PRICES

	Gold: Gold Buy Rates	$44.1435/gg $1,373.00/oz
	Silver: Silver Buy Rates	$0.6976/gg $21.70/oz
	Platinum: Platinum Buy Rates	$45.6863/pg $1,421.00/oz
	Palladium: Palladium Buy Rates	$22.3766/pd $696.00/oz