• Jade Matrix - a rock containing a mixture of tremolite and albite feldspar.  Also called snowflake jade.

  • Jetvariety of fossilized wood, similar to lignite or brown coal, and halfway in formation between peat and bituminous coal.  Also called gaget.

  • Jet Stone - black tourmaline, also called schorl.

  • Jewel - an unmounted gemstone or an ornament worn for personal adornment which contains gemstones.

  • Jump Ring - a small round wire ring made of gold, platinum or silver used to connect two separate items together such as attaching a clasp to a chain.  Jump rings come in many different sizes and thicknesses and are available in yellow, white, and rose gold, platinum and silver.