Dims: 1.4 x 0.9 x 0.6" (3.6 x 2.4 x 1.5 cm)
Wt: 8.5 g
This large thumbnail specmien consists of an amorphous chunk of white precious Opal. It shows no crystal form and exhibits the standard conchoidal fracture and dull vitreous luster. Though it generally has a white color, several bands of colorful iridescence are present, along with a small amount of rough, dull matrix rock. Cutting a stone from this piece is possible, but the colors show rather well just as it is. In order to prevent crazing (the cracking of an opal's surface), it is best to store it in a moist environment and guard it against extreme changes in temperature.