COLOUR GUIDE 345
Sapphire | See pp.70–73 | Sapphire occurs
in various blues, as well as most other colours.
Lustre is subadamantine, vitreous, or pearly.
It is transparent to opaque.Kyanite | See p.280 | Kyanite has a
vitreous, pearly lustre and is blue, green,
brown, yellow, red, or colourless. It ranges
from transparent to translucent.Tanzanite | See p.253 | Tanzanite
occurs in shades of sapphire blue,
amethyst, or violet. It is transparent
and has a vitreous lustre.Lapis lazuli | See pp.174–177 | This gem
is intense deep blue, violet, or greenish blue
and may contain gold-coloured pyrite flecks.
It has a vitreous, greasy lustre and is opaque.Labradorite | See p.169 | Dark or
black-gray, and labradorescent (golden
yellow, blue-green, purple, bronze), this
gem is vitreous and transparent to opaque.Dumortierite | See p.277 | Dumortierite
is dark blue, violet-blue, red-brown, or
colourless, ranging from translucent to
opaque. It is vitreous in lustre.Quartz (amethyst) | See p.136 |
Amethyst is a purple, violet, or pale
red-violet quartz. It has a vitreous lustre
and is transparent to opaque.Sodalite | See p.180 | Sodalite
appears as blue or blue-violet with a lustre
that is vitreous or greasy. It is transparent,
translucent, or opaque.Hematite | See p.86 | Hematite may
be found as black, steel gray, or partially
reddish in colour. It has a metallic lustre
and is opaque.Quartz (ametrine) | See p.138 |
This variety of amethyst is purple or violet.
Like amethyst, it has a vitreous lustre and
is transparent to opaque.Sugilite | See p.221 | Either violet
or purple-red in colour, sugilite has a
resinous lustre and is transparent,
translucent, or opaque.Thulite | See p.253 | This pink to
red variety of zoisite is often mottled
with white and grey. It has a vitreous
lustre and an opaque appearance.Garnet (almandine) | See pp.258-63 |
Almandine is a red to violet-red variety
of garnet. It is transparent and has a
vitreous lustre.Beryl (red) | See pp.236–41 | A
red to violet-red variety of beryl, this mineral
may be transparent to translucent. It has
a vitreous lustre.Tourmaline (rubellite) | See pp.226–29 |
Rubellite is a strong dark red to a pinkish
red. With a vitreous lustre, it is transparent
to opaque.Fluorite (blue John) | See pp.96–97 |
This gem is a banded purple and white with
a vitreous lustre. It ranges from transparent
to translucent.338-347_Colour-Index.indd 345 19/05/2016 12:55