Description
Black Agate, Dyed, Heishi, 4x2mm.
This price is for one strand 15 to 16 inches long.
4x2mm strands have 145 to 150 pieces.
Agate is a common rock formation, consisting of chalcedony and quartz as its primary components, consisting of a wide variety of colors. Agates are primarily formed within volcanic and metamorphic rocks.
Hardness 6.5-7
These beads are dyed with the introduction of coloring agent into a gemstone to give it new color, intensify present color or improve color uniformity.
Heating is a very common form of enhancement and is used to affect desired alterations of color and/or clarity. Heating can also be used to lighten or darken a stone. Heat is one of the conditions that cause gems to form, whether in the ground or in a lab. Heating occurs during natural gem formation. But heating applied to the stone after gem formation is an enhancement.
These beads are cut, drilled and polished in China.
