Reviews
4" Polished Freestanding Green Pistachio Opal - Madagascar
This is a beautiful green "pistachio" opal specimen that comes from the Antananarivo Province of Madagascar. It has been polished to a glossy finish to show off the organic patterns and warm, mossy hues of this attractive mineraloid. The base has been cut flat for convenient display.
About Common Opal
Common opal, often called "potch," is a variety of hydrated silica that lacks the internal, shifting opalescent colors found in precious opals. It is opaque to translucent, commonly exhibiting solid colors like white, brown, green, blue, or pink. Used in jewelry as cabochons or beads, it is often prized for its smooth texture and consistent, solid hues rather than vibrant flashes.
Common opal, often called "potch," is a variety of hydrated silica that lacks the internal, shifting opalescent colors found in precious opals. It is opaque to translucent, commonly exhibiting solid colors like white, brown, green, blue, or pink. Used in jewelry as cabochons or beads, it is often prized for its smooth texture and consistent, solid hues rather than vibrant flashes.
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 classifies this mineral conglomerate as an opal.
During formation, microscopic holes develop within the silica, forming secondary silica lamellae-like strings throughout, giving the rock its inner web-like appearance.
During formation, microscopic holes develop within the silica, forming secondary silica lamellae-like strings throughout, giving the rock its inner web-like appearance.
$39 $31
SPECIES
Common Opal
LOCATION
Antananarivo Province, Madagascar
SIZE
4" tall, 3.1" wide
CATEGORY
SUB CATEGORY
ITEM
#387322
