6.4" Polished Crazy Lace Rosetta Stone Slab - Mexico

This is a gorgeous polished slab of crazy lace rosetta stone, also known as rosetta jasper. This specimen was collected and polished in Chihuahua, Mexico. The colors vary throughout this specimen, ranging between pink, red, peach and white. It is a mix of quartz, jasper and agate, hence the use of "stone" in the name.

It comes with an acrylic display stand.

Jasper is a term that can be applied to an opaque variety of chalcedony. The opaqueness is due to a higher concentration of impurities mixed with silica/quartz compared to other varieties of silica, such as quartz or agates. Like agate it may form in a wide variety of colors, and is often multi-colored. In most cases, jasper forms when silica-rich fluids permeate throughout a soft sediment or volcanic debris deposit. The fluids then crystallize around the particles/impurities, resulting in a cementation process. Most often, the impurities present determine the coloration of the deposit following solidification, but other factors can play a role in the color of what is now considered a jasper.

Agate is a variety of microcrystalline quartz (chalcedony) that displays translucence and, in some cases, banding. Agate primarily forms when silica-rich fluids fill pockets within rocks and/or fossils, depositing the silica along the walls of the rock. This process can result in banding patterns, as the compositions and impurities of these depositing fluids change over time. These banding patterns can either form as flat layers, creating linear patterns known as waterline agate, or as rounded layers, forming more common ring-like patterns. These patterns depend on the surfaces available for deposition.

Crazy lace agate, also known as Mexican Agate, is a unique banded agate that comes from Chihuahua, Mexico. It gets its name from complex, lacy patterns swirling through the stone. Colors can vary from cream and orange to red, and are caused by iron and aluminum inclusions in the agate.

Quartz is the name given to silicon dioxide (SiO2) and is the second most abundant mineral in the Earth's crust. Quartz crystals generally grow in silica-rich environments--usually igneous rocks or hydrothermal environments like geothermal waters--at temperatures between 100°C and 450°C, and usually under very high pressure. In either case, crystals will precipitate as temperatures cool, just as ice gradually forms when water freezes. Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountain formation: these veins can be hundreds of millions of years old.
Chalcedony var. Agate/Jasper
Chihuahua, Mexico
6.4 x 4.3", .63" thick