"Freeze-Dried Specimens"

Demonstrate the vivid contrasting colors of fifteen specimens when illuminated under shortwave ultraviolet light. Some specimens are also long wave reactive. Specimen average size: 1" x 1". Comes in compartmented box with key sheet.

This Universal Specific Gravity Kit enables fast and convenient measurement of the specific gravity of gemstones, minerals, and other solid materials. Its user-friendly above-the-scale design allows samples to be weighed in air and underwater without changing the setup.