COLOUR GUIDE 341
Baryte | See p.120 | Yellow, colourless,
white, brown, gray, black, or with red, blue
or green tints, it is transparent to opaque,
with a vitreous lustre.Garnet (topazolite) | See pp.258–59 |
Yellow to yellow-brown, topazolite ranges
from transparent to translucent with
a subadamantine or vitreous lustre.Apatite | See p.118 |^ Apatite is transparent
and is found in a range of colours, from
yellow, green, and colourless, to blue and
violet. It has a vitreous lustre.Titanite | See p.275 | Titanite may be
yellow, green, or brown, or mixtures of these.
From transparent to opaque this gem has an
adamantine lustre.Beryl (Heliodor/golden beryl) | See
pp.240–41 | Heliodor is lemon to golden
yellow, with a greenish tinge. It is transparent
to opaque, with a vitreous lustre.Tourmaline (dravite) | See pp.226–29 |
Dravite is dark yellow, yellow brown, or
brownish black. It has vitreous lustre and
is transparent to opaque.Scapolite | See p.184 | Scapolite
occurs as yellow, rose-pink, violet, or
colourless material. It is transparent
and has a vitreous lustre.Scheelite | See p.126 | Scheelite can
be yellow, yellowish white, colourless
gray, orange, or brown. It is transparent,
with an adamantine lustre.Brazilianite | See p.116 | With green,
yellowish-green or golden hues and
a vitreous lustre, brazilianite has a
transparent appearance.Gold | See pp.36–39 | Displaying a
distinctive rich yellow colour, paling to
a whitish-yellow, gold is opaque and
has a metallic lustre.Onyx (sardonyx) | See pp.154–55 | This
stone is brownish red with white or black
parallel stripes. It is translucent with a
vitreous, silky lustre.Amber | See pp.310–11 | Occurring in
yellow, white, red, green, blue, brown,
or black form, amber is transparent to
opaque with a lustre that is resinous.Quartz (citrine) | See p.137 |
This quartz variety is light yellow to dark
yellow or gold-brown. It is transparent
to translucent with a vitreous lustre.Cassiterite | See p.88 | Commonly found
in brown or black tones with colour bands,
cassiterite has an adamantine lustre and is
transparent to opaque.Copal | See p.308 | In shades of yellow,
white, red, green, blue, brown, or black,
copal is transparent to opaque with a
resinous lustre.Andalusite | See p.274 | Andalusite may
be yellowish green to green, brown, pink, or
colourless, with a vitreous lustre. It runs
from transparent to opaque.338-347_Colour-Index.indd 341 13/06/2016 10:41