World Clock
Hong Kong  00:01
New York  12:01
Mumbai  21:31
Jerusalem  18:01
Brussels  17:01
Moscow  20:01
Home > Virtual Office > Birthstones By Month > September - Sapphire

September - Sapphire

September Gemstone of the Month – Sapphire


  • Chemical formula: aluminium oxide (Al-2O3)
  • Group: corundum
  • Color: various shades of blue, green, yellow and black
  • Mohs scale hardness: 9, the second hardest gem to diamonds
  • Specific gravity: 3.95–4.03
  • Refractive index: 1.77–1.76
  • Crystal system: trigonal
  • Zodiac: Taurus
  • Jewish tribe:  Issachar
  • Planet: Venus
  • Christian apostle: Saint Andrew
  • Guardian angel: Verchiel
  • Hindu chakra: Vishuddha – the fifth chakra representing the throat
gem stone safire
 Rough Sapphire

Origin of the Name

There are several theories as to the origin of the name. One theory suggests it is from the Greek "sappheiros" meaning "blue stone," although it is widely believed not to refer to the same stone. Another theory suggests it is from the Sanskrit "sauriratna" in honor of the planet Saturn.


Prominent Attributes

Sapphires are made of aluminium oxide, which is colorless in its pure form. Sapphires derive their color from trace elements of iron and titanium oxide. The amount of titanium in the aluminium oxide plays a key role in determining the blue color of sapphires. Royal blue sapphires are most desired and valuable.



sefire gem stone
 Sapphire and diamond pendant by Omri Talins of Talins

Good quality blue sapphires are rare and very precious and therefore have many imitations. Natural blue stones with colors similar to sapphires include blue spinel, blue tourmaline, tanzanite, iolite and even glass is sometimes substituted for sapphires.


Sapphires and rubies are nearly identical in their chemical composition and crystal system. The sapphire's crystal system inspires birefringence, and therefore requires great expertise in finding the correct polishing direction for the gem. Only the right polishing direction will yield a nice-colored stone.


Sapphires in Judaism

Sapphires are mentioned in the bible and one of the stones on the Hoshen breastplate, a ceremonial piece worn by the high priest of the ancient Israelites: "Fashion a breastpiece for making decisions—the work of a skilled craftsman. Make it like the ephod: of gold, and of blue, purple and scarlet yarn, and of finely twisted linen… Then mount four rows of precious stones on it… in the second row a turquoise, a sapphire [b] and an emerald" (Exodus 28:15-22).


We cannot know if the blue Hoshen stone really was the sapphire we know today. It is actually presumed to be lapis lazuli – a blue gem common to the area in ancient times. Lapis lazuli is softer than sapphires and easier to process. Pliny the Elder, a first century philosopher, described the "sapphire" as a stone resembling lapis lazuli  - a blue stone with flakes of gold, i.e. – not the sapphire we know today.


gem stone sefire
 Sapphire Pin by Hagit Re'em

According to the description of the flags of the tribes of Israel in the Talmud, which correspond with the colors of the Hoshen stones, sapphire represents the Tribe of Issachar.


According to the Midrash – the book of Rabbi Eliyahu HaCohen, of the 18th century, sapphires can heal the eyes, and are good for various aches and pains. Other bible notations of the sapphire appear in the books of Ezekiel, Job and Lamentations.


Healing Attributes

Blue sapphires have been adored throughout the centuries. The gem has been believed to have the ability to heal various inflictions and for removing harmful elements from the body. It has also been used as an antidote to harsh poisons.


Diamond jewelry
Sapphire and diamond ring by Illimitee

The sapphire is considered the gemstone of the soul. Its blue color is reminiscent of the sky and represents the purity of the souls. Wearers are believed to be able to ward off jealousy, garner divined sympathy and broker peace between enemies.


Sapphires' rarity, color and qualities have made in prominent among royal jewels. Sapphires can be seen the crowns, scepters and prestigious jewels of all royal houses.



Sapphires are mined in Australia, Myanmar, Brazil, Tanzania and other African nations.


gem stone
 Logan Sapphire

Famous Sapphires

The Logan Sapphire is a deep blue sapphire and, at 423 carats, it is the second largest blue sapphire in the world. The cushion-cut is set in a brooch surrounded by 20 round brilliant cut diamonds weighing 16 carats in total. The Logan Sapphire is named after Mrs. John Logan, who donated the gemstone to the Smithsonian Institution in 1960.


Famous September Birthdays

Greta Garbo, Sofia Loren, Lance Armstrong, Stephen King, Julio Iglesias, Ray Charles, Brigitte Bardot, Ivan Pavlov, Jim Henson, Milton Hershey, Agatha Christie, Prince Harry, Leonard Cohen.




Hagit Reem




© Copyright 2014 Israel Diamond Institute. All rights reserved
Terms of Use Privacy Policy
Israel Diamond Institute ewave
Access the Israel diamond institute portal
registred members
Forgot your password?