Sardonyx (sardonux), here only in N.T., white with layers
of red, from sardion (red carnelian) and onyx (white); for
sardius (sardion) see  4:3 ; chrysolite (chrusolithos), here
only in N.T. ( Ex 28:20 ), stone of a golden colour like our
topaz or amber or a yellow beryl or golden jasper; beryl
((8872)ullos), again here only in N.T. ( Ex 28:20 ), note the
difficulty of identification, much like the emerald according to
Pliny; for topaz (	opazion), here only in N.T. ( Ex 28:17 ), a
golden-greenish stolle; chrysoprase (chrusoprasos), here only in
N.T. (not in LXX), in colour like a teek, translucent
golden-green; jacinth (huakinthos), of the colour of the
hyacinth, a violet colour (Pliny), already in  9:17  like blue
smoke, like achates in LXX; amethyst (amethustos), only here in
N.T. ( Ex 28:19 ), of a violet and purple colour, more brilliant
than the huakinthos. Swete sums up the colours thus: blue
(sapphire, jacinth, amethyst), green (jasper, chalcedony,
emerald, beryl, topaz, chrysoprase), red (sardonyx, sardius),
yellow (chrysolite). But even so there is great variety in hue
and brilliancy and in the reaction on each other. Clement of
Alexandria argues that this variety illustrates the variety of
gifts and graces in the twelve apostles. Possibly so.