Rainbow Cal Silica from Mexico This material is a new discovery from Mexico and has many layers of different colors: red, brown, green, tan, blue, yellow, white and others. It has been verified as a natural stone not man made. It is composed of Calcite-Allophane (Blue and green) and silica with various trace metals that cause the other colors. It has been stabilized the same as Turquoise. This makes it very stable and easy to cut and polish. Be the first on your block to have some of this unique stone. There is a big controversy of whether this stone is natural or man made. Here is what I know as of 4/2/2003: CLICK HERE FOR INFO

click a picture to enlarge Rainbow Cal Silica gem sphere 6/28 01 - LARGEST one so far! SUPER Beautiful! Spheres of this material can't be much larger than this since the pieces are only so thick in the rough. It will be some time before I cut another so large do to the waste and time - DON'T MISS THIS ONE! OOps! You missed it... Sold to  very nice Japanese customer. :) If you want a BIGGIE like this let me know = EMAIL ME 47.7 mm / 1.87 inches - 113 gram / 565 carat $200.00 + SHIPPING SOLD