Black Tourmaline 9x13-12x16mm Top Drill Irregular Flat Drop - 15-16 Inch Paperclip Chain The yellowish colors of heliodor

The yellowish colors of heliodor are usually caused by small amounts of iron within the mineral's crystal structure

Wood Opalite is a type of petrified wood that has been impregnated with the Silicon Dioxide commonly known as Opal

It is a particularly unusual gem because it exhibits a special optical property known as tenebrescence

All species of garnets possess similar physical properties and crystal forms

Black Tourmaline 9x13-12x16mm Top Drill Irregular Flat Drop - 15-16 Inch Paperclip Chain The yellowish colors of heliodorBlack Tourmaline is a black crystalline aluminum borosilicate mineral with occasional light gray inclusions that appear as flecks or veins. Tourmaline is classified as a semiprecious stone and occurs in a vast array of colors, everything from colorless to black, from pastel to bright to dark. It can even exhibit various colors within the same specimen. Its name derives from the Sinhalese word turamali, which translates to stone of many colors. Due to