Obsidian is an igneous rock that
forms when molten rock material
such as lava cools very quickly.
It usually has a very smooth
texture and is also commonly
referred to as volcanic glass.
Obsidian is mostly black but can
sometimes be brown, tan, or
green and very rarely blue, red,
orange, or yellow.
Pyrite is a mineral and has
a bright, metallic finish. It is
commonly called “fool’s gold”
since it looks so much like
gold. Use your Stereoscope to
find the gold flecks in the ore.
Quartz is a widely found
mineral that consists mainly
of silica. It is the second-most
abundant mineral in Earth’s
crust after feldspar. There
are many varieties of quartz
including gemstones like
amethyst and rose quartz. The
sand you see at the beach is
even a type of quartz!
Granite is an igneous rock that
is often mixed with magmatic
rocks. Due to its strength and
toughness, granite is often used
for sculpting, construction, and
design. Granite can be found in
a variety of colors but is mainly
white, pink and gray.
Obsidian
Pyrite Ore
Milky Quartz
Granite
6
Summary of Contents for stereoscope
Page 1: ......
