These gemstones are a durable quartz composite with the usual quartz hardness of 7. These stones begin as asbestos. A transformation begins when quartz becomes imbedded between the asbestos fibers. This process is somewhat like the petrification of wood. We have a lot more information about tiger eye and tiger eye like stones (Click Here)
These earrings are 16mm (.62") square and the wires are 3/4" long
These stones both look like the stone with the lines. We were unable to get the light to show the lines on both stones at the same time.
The pendant is 2" tall from the tip to the top of the bail and .78" wide. The Earrings are 1" tall and .62" wide. The wires add another .80". Chain not included.