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see monthmonth,
in chronology, the conventional period of a lunation, i.e., passage of the moon through all its phases. It is usually computed at approximately 29 or 30 days. For the computation of the month and its harmony with the solar calendar and for the months in others than the
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(religion, spiritualism, and occult)

Supernatural powers have been attributed to objects since ancient times. Gemstones—precious and semi-precious—have been so assigned by astrologers and magicians for thousands of years. The Greeks and Romans believed that there was a force inherent in the stones.

The particular power attributed to a stone is usually based on the stone's color. For this reason there are frequently a number of different stones equally useful for various purposes. For example, in gem therapy ruby, garnet, and red coral would all be useful for the heart and for blood circulation and stimulation, as their red color corresponds to that of blood. Because blue is believed to having a calming effect, sapphire, beryl, lapis lazuli, were used against fevers.

Stones are also associated with birth dates and, as birthstones, are believed to have potency for those people born under their particular zodiacal sign. To carry your birthstone is to ensure good luck, health and prosperity. Medieval astrology established such a relationship, although the particulars have been changed over the years to accommodate availability of the stones, their cost, and even their popularity.

Originally it was suggested that the stones corresponded to those on the Breastplate of Aaron, the Jewish High Priest, but this does not hold up under scrutiny. The twelve stones were also said to represent the twelve tribes of Israel, the twelve months of the year, and the twelve signs of the zodiac, and were set in four rows of three. According to the instructions given in Exodus 28:17-20, the stones were arranged as follows: Sardius, Topaz, and Carbuncle in the first row; Emerald, Sapphire, and Diamond in the second; Ligure, Agate, and Amethyst in the third; and Beryl, Onyx, and Jasper in the fourth. But these names do not necessarily equate with the names used today. For example, the "sapphire" of the Bible was more probably lapis lazuli rather than what we now know as sapphire, and "diamond" was probably what we now know as white topaz.

Birthstones, then, are not constant; they change over the generations. Here are the associations according to some magicians and Witches:

AriesRuby, Bloodstone, Red Jasper
TaurusGolden Topaz, Coral, Emerald
GeminiCrystal, Carbuncle, Aquamarine
CancerEmerald, Moonstone
LeoRuby, Sardonyx, Amber
VirgoPink Jasper, Turquoise, Zircon
LibraOpal, Diamond
ScorpioAgate, Garnet, Topaz
CapricornBlack-and-white Onyx, Beryl, Jet
AquariusBlue Sapphire
PiscesDiamond, Jade

If you wish to be directed by the day of the week on which you were born, then the following are the gems associated with the days:

SundayGold and Yellow gems
MondayPearls and all white stones
TuesdayRubies and all red stones
WednesdayTurquoise, Sapphire, and all blue stones
ThursdayAmethyst and all purple stones
FridayEmerald and all green stones
SaturdayDiamond, also black stones

David and Julia Parker give the following, as the stones associated with the zodiac signs:


To complicate the issue, many authorities give the calendar months rather than the zodiacal signs. For example, Arthur Edward Waite, writing as "Grand Orient" in The Book of Destiny (University Books, 1972) gives the following:

JanuaryGarnet, Zircon
FebruaryPearl, Amethyst
MarchJasper, Ruby
AprilDiamond, Sapphire
JulyRuby, Cornelian
AugustMoonstone, Sardonyx
SeptemberChrysolite, Sapphire
DecemberMalachite, Turquoise

The Encyclopedia Britannica agrees on some of these, giving a table of both traditional and modern stones:

Month Traditional Modern Synthetic
January Garnet Garnet
February Amethyst Amethyst
March Bloodstone Aquamarine Aquamarine
April Diamond White Sapphire
May Emerald Emerald Emerald
June Pearl Alexandrite Cultured Pearl
July Ruby Ruby August
August Sardonyx Peridot Peridot
September Sapphire Sapphire
October Opal Tourmaline Rozircon (pink or green)
November Topaz Topaz Quartz Topaz (citrine)
December Turquoise Zircon Zircon

References in periodicals archive ?
Garnet, the January birthstone, comes in many colours, but a reddish brown is the most common.
And the 12 birthstones are each said to bring a special gift to the wearer.
Aquamarine, my birthstone, hot only treats "ailments of the head, neck, and throat"; it offers "protection for sensitive people" and should be worn to calm fears, ease anxiety, and to insure a good night's sleep.
Specializing in personalized jewelry such as birthstone jewelry and engraved jewelry, and sterling silver jewelry the site has grown to include a large collection of celebrity style jewelry, designer style jewelry, monogram necklaces and more.
A Sheikh Mohammed-owned daughter of Machiavellian and 1993 Prix de Diane runner-up Baya, Birthstone proved her ability to handle testing ground on her debut at Deauville.
She says: ``Obviously my own birthstone is my favourite,but that's not just because it's a diamond.
Among the new collections are Burnes' Glamour Girls, targeted at the "tween" and teen markets, and the Birthstone Collection by Carr.
The diamond is the birthstone of April; celebrate your love of diamonds every month with a diamond ring or earrings from Diamond Mansion Co.
January's birthstone is garnet which is generally thought to be a deep red stone, but, in fact, can be a variety of colours.
The Classic is part of Reebok's limited edition range of trainers for 1999, where the famous logo will be replaced by a birthstone relevant to each month.
There are also books regarding gemstones names, birthstones by month, semi-precious stones, crystal and gemstone meanings, birthstone colours by month, crystal chakra meditation techniques and jewelry designs.