Gemology
Are Lab-Grown Gemstones Real? Natural, Syntheti...
Is a lab-grown ruby a real ruby? Ask three sellers and you'll get three different answers. One says yes, it's the same thing. Another says no, it's fake. A third...
Are Lab-Grown Gemstones Real? Natural, Syntheti...
Is a lab-grown ruby a real ruby? Ask three sellers and you'll get three different answers. One says yes, it's the same thing. Another says no, it's fake. A third...
What Is Sphene (Titanite)? The Gem With More Fi...
Hold a well-cut sphene under a lamp and turn it a few degrees. Flashes of orange, green and blue jump across the facets, then vanish and come back somewhere else....
What Is Sphene (Titanite)? The Gem With More Fi...
Hold a well-cut sphene under a lamp and turn it a few degrees. Flashes of orange, green and blue jump across the facets, then vanish and come back somewhere else....
Carat vs Grams: How Gemstones and Mineral Speci...
You're browsing two listings. One is a spinel at 3.46 ct. The other is a crystal cluster at 500 g. Which one is heavier? The cluster, by a lot. Five...
Carat vs Grams: How Gemstones and Mineral Speci...
You're browsing two listings. One is a spinel at 3.46 ct. The other is a crystal cluster at 500 g. Which one is heavier? The cluster, by a lot. Five...
Why Are Crystals Different Colors? The Real Causes
Why Are Crystals Different Colors? Pure quartz is water-clear. Add a trace of iron and some natural radiation, and you get amethyst. Swap the iron for aluminum and you get...
Why Are Crystals Different Colors? The Real Causes
Why Are Crystals Different Colors? Pure quartz is water-clear. Add a trace of iron and some natural radiation, and you get amethyst. Swap the iron for aluminum and you get...
Mohs Hardness Scale Explained for Gemstones and...
Topaz is an 8 on the Mohs scale. That's harder than quartz and harder than nearly everything else in a normal jewelry box. And yet every so often someone drops...
Mohs Hardness Scale Explained for Gemstones and...
Topaz is an 8 on the Mohs scale. That's harder than quartz and harder than nearly everything else in a normal jewelry box. And yet every so often someone drops...
What Is Opal? The Science Behind Play of Color
Hold a precious opal up to the light and tilt it, and you'll see something no pigment or dye could ever produce: color that moves. Red slides into green, green...
What Is Opal? The Science Behind Play of Color
Hold a precious opal up to the light and tilt it, and you'll see something no pigment or dye could ever produce: color that moves. Red slides into green, green...