2.5" Polished Green Opal Sphere - Madagascar

This is a bright green polished green opal sphere mined in Madagascar. The polish of the sphere really amplifies the color that this mineral displays. This specimen comes with a stand.

Green opal is an amorphous variety of quartz, with the chemical composition of SiO2 · nH2O. This hydrated silicate mineraloid has the associated chemical composition and lack of crystal structure that terms this mineral conglomerate as an opal.

During formation, microscopic holes form within the silica, forming secondary silica lamellae-like strings throughout, giving the rock its inner web-like appearance.

FOR SALE
$35
DETAILS
SPECIES
Green Opal
LOCATION
Madagascar
SIZE
2.5" wide
SUB CATEGORY
ITEM
#95856