In the past, glass manufacturers added uranium to glass for color. Uranium has since become more strictly regulated, but the old uranium glass objects are still floating around. Because of the uranium content, these marbles glow bright green under ultraviolet light. ...

In the past, glass manufacturers added uranium to glass for color. Uranium has since become more strictly regulated, but the old uranium glass objects are still floating around. Because of the uranium content, these marbles glow bright green under ultraviolet light. ...

Helenite is glass made from fused volcanic dust from Mt. Saint Helens.  Approx. 0.75" diameter Please note: each marble is unique and contains minor imperfections. Surfaces are not completely smooth.

Write messages that only appear under UV light.  

Bismuth is one of the most impressive elements. The crystal structure and colors are 100% natural. Small:  10–29g Medium:  30–59g Large:  60-89g Extra Large: 90g-119g   This listing is for one bismuth crystal. Photos are representative of what you will receive. Please allow...

Ferrofluid is an iron-based liquid that reacts in the presence of a magnetic field.   Comprised of nano-scale magnetic particles suspended in a transparent liquid, ferrofluid aligns itself to a magnetic field, making it easy to visualize the field. With this amazing magnetic...

This humidity indicator card is a useful tool to help protect sensitive items from exposure to too much moisture in the air. It works by taking advantage of the color-changing properties of the chemical cobalt dichloride (CoCl2). When dry, or...

A single vial of bronze to add to your collection of metals.      The composition of this sample is based on ancient bronze samples.  Each vial contains approximately 15 grams of bronze.

10g of fluorescein salt powder in a vial.  This red powder is a dye that turns an intense yellow-green when mixed with water. Fluorescein was first made in 1871 and it has since found use in many niche applications thanks...

This material has been engineered to be chemically and mechanically identical to the surface dirt of the landing site of Perseverance at Jezero Crater on Mars.  Regolith is a mixture of dust, soil, broken rock and other organic materials. NASA/JPL uses this material...

Zirconium is an element with valuable properties. Don’t dismiss this element as “cheap” due to the commercial popularity of cubic zirconia (ZrO2). Pure Zr is a metal and one of the most heat and corrosion resistant elements. Due to these properties,...

If you look closely, you can see the slight curves on the acrylic surface of this lens. They may not look like much, but they have been precisely arranged to bend the light passing through the lens to form the image projection....