Labradorite 12x20-15x30mm Rounded Rough Collar - 15-16 Inch Color_Blue but will not be chemically

but will not be chemically treated or altered

Australian Butter Jasper is a relatively new variation of Jasper that definitely meets that criteria

At that time yellowish gems were called "topaz" in many parts of the world

however it does exhibit a lustrous sheen referred to as “opalescence

Wood Opalite occurs in a range of colors

Labradorite 12x20-15x30mm Rounded Rough Collar - 15-16 Inch Color_Blue but will not be chemicallyLabradorite is remarkable for the way its aggregate layers refract light, creating iridescent flashes of blue, gold, pale green or copper red. This effect is known as labradorescence, taking its name from the stone. Labradorite is usually gray to green, dark gray, light gray or black. It was discovered in Labrador, Canada in 1770 and named for the area, though it is referenced as a highly revered stone in much older Inuit tribal legends.