How to Test Gold Purity with a Scratch Test?

Answer The value of gold depends on two factors; how much the gold weighs and how pure it is. The science of measuring the purity of gold is assaying. Professional assayers typically use specialized labor... Read More »

Top Q&A For: How to Test Gold Purity with a Scratch Test

Can you test gold-leaf purity?

Yes, you can test the purity of gold leaf by dissolving a small portion in aqua regia--a three-to-one mixture of hydrochloric and nitric acids--the only mixture in which pure gold is soluble.Refere... Read More »

How to Test Water Purity?

In an age when bottled water is readily available, many people are wary of what comes from their kitchen faucet. Given that drinking tap water is far less expensive than regularly buying bottled wa... Read More »

Can you test gold with a lighter or fire?

Is it better to test older or younger students with a standardized test?

On One Hand: Testing Younger Students Gives More TimeAccording to Oregon English as a second language (ESL) teacher Beverlee Brick, the younger a student receives standardized testing, the sooner e... Read More »