COLOUR GUIDE 347
Scapolite | See p.193 | This transparent
gem may be colourless, or range from
yellow to rose pink or violet. It has a
vitreous lustre.Alabaster | See p.122 | Alabaster
has a white appearance with a dull
lustre. It may range in transparency
from translucent to opaque.Sillimanite | See p.276 | Occurring in
shades of blue and green, grey-green,
brownish or colourless, it has a vitreous
lustre and is transparent to opaque.Kunzite | See p.209 | Kunzite may
be found in pink to violet-pink hues,
with a vitreous lustre. The mineral has
a transparent appearance.Sandstone | See p.325 | Sandstone
can be tan, brown, yellow, red, grey,
pink, white, or black. It has a vitreous
lustre and is opaque.Limestone | See p.324 | Limestone
is commonly white, but also brown,
yellow, red, blue, black, or grey. It has
a dull lustre and is opaque.Granite | See p.329 | Granite
ranges from pink to a white or grey
colour and has a dull lustre. It has an
opaque appearance.Staurolite | See p.281 | Staurolite
may have a reddish brown or black
appearance with a vitreous lustre. It is
translucent and, more rarely, transparent.Soapstone | See p.191 | Soapstone
is opaque with a greasy lustre, and
ranges from greenish to yellowish, white,
greenish brown, or reddish.Cerussite | See p.101 | With an
adamantine lustre, cerussite is yellow,
brownish, colourless, white, blue-green,
grey, or black. It is transparent to opaque.Seashell | See p.298 | White, grey, silver,
yellow, blue-green, pink, red, brown, bronze,
or black, seashell has a pearly lustre and is
translucent to opaque.Mother of pearl | See p.299 | Found in
most colours, as well as iridescent purples,
blues, and greens, mother of pearl has a
pearly lustre and is translucent to opaque.Colour in minerals is caused by
the absorption or refraction of
light of particular wavelengths
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