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What Gemstones are in the Bible?
What gemstones are in the Bible? The Bible makes many general references to “precious stones” and “jewels,” most often as metaphors for such attributes...
Mercury-Bearing, Companion Silicates of Sycamore Creek
Story and photos by Lauritz A. Jensen, with photos also by Hans Gamma
Few hardcore lapidaries and mineral hobbyists would ever consider passing up a...
Staurolite: Fairy Crosses With Storied Legacy
By Jim Brace-Thompson
Many minerals crystallize in patterns that resemble across, a shape that has held special significance in Christian and pre-Christian civilizations. Two minerals...
Cristobalite: Sparkly Snowflake Structure
By Jim Brace-Thompson
Silica dioxide (SiO2)
Quartz, or silica dioxide (SiO2), is a common mineral beloved by crystal collectors of all stripes. No collection is complete...
Mimetite: More Than An Imitator
By Jim Brace-Thompson
Mimetite is a lead arsenate chloride mineral with the chemical formula of Pb5(AsO4)3Cl. In structure and appearance, it can closely resemble pyromorphite,...
Just Off the Wheels: Mattie Gadd
By Erin Dana Balzrette
Thoughtful, compassionate, and an amazing lapidary artist and wire wrapper, Mattie Gadd is always a delight to chat with. Her work...
Exploring Fossilized Shark Teeth
Jim Brace-Thompson
Shark teeth are fun fossils because (like dinosaurs) sharks are fearsomely fascinating and (unlike dinosaurs) their fossils are common. A shark may have...
Aragonite: A cave dwelling and coral-shaped mineral
By Jim Brace-Thompson
Aragonite was named for Aragon, Spain, where it was first discovered, but it’s a common mineral that is found worldwide.
Aragonite is a...
Earth Science In the News: Wandering North Pole, Glowing Fossil Eyes
By Jim Brace-Thompson
Our Shifting North Pole
We have both a geographic north pole and a magnet north pole, and the two are not aligned. The...
Glauberite: It’s Not Always What It Seems
By Jim Brace-Thompson
Do you have a mineral labeled “glauberite” in your collection? I do, but I recently learned that it may not be what...

















