David Sanchez

How Does Chalcedony Form? The Chemistry & Geology

Does Real Gold Shine? Explaining Gold’s Luster

How Hard Is an Emerald? Hardness vs. Toughness

Does Gold Fade? The Truth About Tarnishing and Dulling

What Is Gold’s Luster and What Causes It?

Where Does Sterling Silver Come From?

Are Lab-Grown Diamonds Bad for the Environment?

How Is Green Gold Made? The Alloying Process Explained

Can You Break a Ruby With a Hammer?

What Is Morganite Made Of? Its Chemical Composition

Do Lab Diamonds Pass a Diamond Tester?

What Is the K in Gold? Explaining Karat and Purity

How Hard Is Sapphire on the Mohs Scale?

What Causes Diamond Fluorescence?

Which Volcanoes Are Most Likely to Explode and Why?

What Makes a Sapphire Blue? The Science Explained

How Does Quartz Break? Explaining Its Conchoidal Fracture

Are Garnets Magnetic? The Science Explained

Are Gold Bars Pure Gold? The Truth About Purity

Does Rhodium Turn Green? The Truth About Plating