6.4" Polished Agate and Jasper Sphere - Madagascar

 
 
This is a gorgeous, 6.4" wide sphere made from polished agate and jasper that features a variety of colors including hues of purple, blue, orange and beige. Basic testing confirmed that this specimen is a silicate, however the specific composition of this sphere is unknown. It was collected from Madagascar and many of the colors are indicative of this specimen coming from the same area as polychrome jasper.

Comes with the pictured display stand.

Jasper is a term that can be applied to an opaque variety of chalcedony (light does not pass through it) The opaqueness is due to a much larger amount of impurities mixed with silica/quartz. Like agate it may form in a huge variety of colors, and is often multi-colored. In most cases, jasper will occur 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, however other factors can play a role in the color of what is now considered a jasper.

Agate is a variety of microcrystalline quartz that displays translucence and in some cases banding. Agate primarily forms when silica-rich fluids fill pockets within rock and/or fossils, resulting in deposition of the silica along the walls of the rock. This process can result in banding patterns as the composition and impurities of the fluids change over time. These banding patterns can either form as flat layers or rounded layers, depending on the surfaces available for deposition.

FOR SALE
$195
DETAILS
SPECIES
Chalcedony var. Agate/Jasper
LOCATION
Madagascar
SIZE
6.4" across
SUB CATEGORY
ITEM
#121983