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.

Bismuth is one of the most impressive elements. The crystal structure and colors never ceases to amaze. Priced by weight:Small:  10–29g Medium:  30–49g Large:  50+g This listing is for one bismuth crystal. Photos are representative of what you will receive. Please allow...

Write messages that only appear under UV light.  

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...

Almost all cephalopods- the tentacled class of marine mollusks that include the octopus, squid, and cuttlefish- have the ability to eject dark ink from their body as a method of escaping predators. The melanin-based ink is stored in an ink...

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...

These patches were printed in 1969 for the Apollo 11 mission. After the tragic Apollo 1 launch pad fire that killed 3 astronauts, NASA decided to work on removing all flammable materials from the spacecraft cabin. A new material was...

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.

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,...

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...

You will receive the exact three fordite shown.    Weight: 3.4 grams  Fordite, also known as Detroit agate or Motor City agate, mimics natural agate but is man made entirely from automotive paint. Named after it's origin, the assembly line...

You will receive the exact three fordite shown.    Weight: 4.9 grams  Fordite, also known as Detroit agate or Motor City agate, mimics natural agate but is man made entirely from automotive paint. Named after it's origin, the assembly line...

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....