Temporary computer problems

Birthstones
January—Garnet
February—Amethyst
March—Aquamarine or bloodstone
April—Diamond
May—Emerald
June—Moonstone, pearl, or alexandrite (the latter of which changes colors depending on the type of light hitting the stone and in gem quality is considered more valuable than diamond)
July—Ruby
August—Peridot or sardonyx
September—Sapphire
October—Opal or tourmaline
November—Topaz or citrine
December—Turquoise or zircon
Zodiac stones
The trouble with zodiac stones is the lack of consolidation -- no two lists seem to give the same stones, with the exception of garnet for aquarius and amethyst for pisces. Incidentically, if you were born in January between the 21st and 31st, your zodiac stone is the same as your birthstone. The same with February, those born on the 19th or later have the same birth and zodiac stone.
If you read any of the captions, you might wonder what a carat is. Gemstones are measured in carats (not carrot). 142 carats is equal to one ounce. The old carat measurement was slightly more than the new carat. When I say old, I mean several hundred years ago.
Gold purity is measured in karats. For instance, 24-karat gold means that 24 of the 24 parts of the metal are gold. 18 K means that 18 parts of the 24 are gold.