Star Ruby Gemstone Information


Star Ruby is a type of ruby that exhibits a star-like phenomenon known as asterism. Star Rubies contain intersecting needle-like inclusions (often the mineral rutile, a mineral composed primarily of titanium dioxide) that cause the appearance of a six-rayed 'star'-shaped pattern in Star Ruby when viewed with a single overhead light source. To cause a star, the rutile needles form in parallel and tightly packed groups. The reflection off of each group of crystals forms a straight line which appears to float on the surface of the stone. There are always three groups of crystals which intersect at 60 degree angles from each other. The three lines formed connect in the center to form the appearance of a 6 ray star.

The presence of a star is one of the most remarkable phenomena encountered in the world of colored gemstones. This optical occurrence is quite rare, being only found in a very small percentage of the rubies mined around the world.

When looking to buy a Star Ruby, remember that the value of a Star Ruby depends not only on the carat weight of the stone but also the body color, visibility and intensity of the asterism.

The ancients regarded star ruby gems as a very powerful talisman, a guiding star for travelers and seekers of all kinds. They were so powerful, they were said to continue to protect the wearer even after being passed on to someone else. The three rays of light that make up the star are said to symbolize trust, hope and destiny.

Sapphire and ruby are both corundum, Sapphires are corundum of all colors except red while red corundum is called ruby. Although pure corundum is colorless, sapphire results from a combination of titanium and iron oxides. Blue, pink and yellow sapphire and ruby are more familiar and treasured than almost any other gemstone variety.
Corundum is one of the most important of all the colored gemstones and comes in a wide variety of colors: blue, pink, yellow, green, purple, orange, padparadscha, blue green, lemon yellow, color change, and black. With a hardness of 9 on the Moh's scale,corundum is extremely hard and durable, suitable for use in any kind of jewelry.
The prices, uses and value of Star Ruby can differ greatly, depending on the size and quality of the  individual gemstone.  AJS Gems is your source for the highest quality colored gems from across the globe, available at Bangkok direct wholesale prices. We sell only natural ruby and do not deal in any fracture-filled rubies. Discover the thrill of creating your own unique top quality rings, earrings, pendants,  wedding sets, or that  special bracelet necklace set to be given as a gift to the love of your life. 

Why Buy Loose Gemstones Instead of Pre-Set Jewelry?
There are many reasons, but basically it boils down to value and choice.

When buying your gemstone loose instead of a pre-set stone, you can be sure you are getting the best value for your money.  Loose gemstones are less expensive, a better value, and you can really see what you are paying for.  The most important part of getting the right price and finding the best value is to first see what you're getting.  A jewelry setting will hide the inclusions inside a gem, and can deepen or brighten its color.  With a loose stone you can much more easily inspect the gem and see it for what it really is.  In this way you can get a better idea of its true worth and be sure you are paying a fair price.

The second advantage of buying a loose gemstone is choice.  You are free to pick the exact color, cut, shape and variety of the stone for the setting of your dreams, be it yellow gold, white gold, platinum or silver; prong set or bezel set.  You can experience the joy of creating your very own, one-of-a-kind jewelry design. Choose from a variety of jewelry settings and styles to create a completely original presentation that will perfectly suit your individual gemstone and will be as unique as you are!
                                      Star ruby pendant                                                 



Origin Madagascar, Thailand, Sri Lanka, Ceylon, Burma, Burmese, Australia, India, Kenya, Tanzania, U.S.A., China
red, blood red, vivid red, pigeon blood red, pinkish red, orangey red, loose star ruby gemstones come in all shades of red.
Refractive Index 1.759-1.778
Chemical Composition AL2 O3
Hardness 9
Density 4
Crystal Structure Trigonal
Anniversary 5th and 45th

Star Ruby's striking star phenomena is just one reason for this gemstone's popularity. As with all corundum, they are also extremely durable, having a hardness of 9 on the Mohs scale. Ruby has a specific gravity of 4.00, a refractive index of 1.76 - 1.78, and birefringence of 0.008.  The refractive index (RI), measured using a refractometer, is an indication of the amount light rays are bent by a mineral. Birefringence is the difference between the minimum and maximum RI. When birefringence is high, light rays reflect off different parts of the back of a stone causing an apparent doubling of the back facets when viewed through the front facet.
Most gems have a crystalline structure. Crystals have planes of symmetry and are divided into seven symmetry systems. The number of axes, their length, and their angle to each other determine the system to which a crystal belongs.  Star Ruby is classified as having a trigonal crystalline structure because they have three planes of symmetry and four axes. Three axes are at 60 degrees to each other in the same plane. The fourth axis is perpendicular and unequal in length to the other three. The form of a sapphire's crystals depends on the variety and locality.  Star Ruby may have an uneven or a conchoidal fracture but no real cleavage. The amount of light reflected at the surface of a gemstone is its luster and Star Ruby has a glassy (vitreous) luster as opposed to the waxy, greasy, or resinous luster of other stones.


Color is the single most important factor in determining the value of a ruby.  Indeed, the color of a ruby is more important than its clarity. Rubies are rarely clean and even very expensive stones can be slightly included. Subtle differences in color can make great variations in valuations of fine gemstones. Fine gemstones of good color and clarity are always rare and valuable. Highly saturated medium or medium dark tones are best, rubies which are too dark or too light are worth considerably less.


Ovals, rounds, cushions and emeralds are the most common cuts for ruby, due to the typical shape of the rough material. Other popular shapes include pears, briolettes, hearts and marquises. Star Ruby is cut into the cabochon shape in order to develop and properly display the star effect.  Fibers or fibrous cavities within a gem such as a Star Ruby reflect the light which causes a star to appear within the stone. A six-ray Star Ruby has three sets of parallel fibers. Skilled cutters can sometimes create a 12-ray star sapphire but they are rare.


The traditional heating of ruby and sapphire is a widely used and is an accepted enhancement process which can improve the transparency and color of the stones. Techniques range from simply throwing gems into a fire to be cooked, to employing sophisticated electric or gas furnaces at specific pressures and atmospheric conditions. The treatment is permanent and heated stones do not require any special care.
AJS Gems fully discloses any and all treatments to our gemstones.


There are several important ruby sources. The most famous source of top quality rubies known to mankind is the Mogok Stone tract of Burma (Myanmar). This has remained the world’s premier source of gem grade rubies for over 800 years. While fine examples can be found in Africa, Sri Lanka, Thailand, Vietnam and a few other sources, none can compare with the purity and intensity of the finest “pigeon blood” rubies of Burma.

About 650 kilometers north of the Burmese capital Rangoon (Yangoon) in the Katha district of Northern Burma, lies a 180 square kilometer zone consisting of heavily jungled hills, several ethnic groups, and what is arguably one of the most picturesque regions in the entire country. For several centuries the region has seen lots more human blood spilt that pigeon’s blood in the quest of the prized “padamya” the Burmese term for ruby.

Other terms for ruby such as the Thai word “taubptim” are also derived from the word for the pomegranate fruit. Traditionally, the Burmese have referred to the finest hue of ruby as “pigeon’s blood” (ko-twe), a term which may be of Chinese origin. Top quality color was described as that of a drop of blood (drawn from an artery) on a highly polished silver plate.

Rubies from Mogok owe their intense beauty to two different optical effects. First is the purity and saturation of the red color common to these rare gems. Second is the often strong flourescent reaction to ultraviolet light which adds a red glow to the gems when viewed in natural light. Put the two together and you have an unbeatable combination of color sources resulting in a glowing red not found elsewhere in nature.


The myths, legends, beliefs, superstitions, traditions and symbolism associated with sapphire have been numerous...

Legend has it that the first person to wear Sapphire was Prometheus, the rival of Zeus, who took the gemstone from Cacaus, where he also stole fire from heaven for man.

Known as the "Gem of Heaven", the ancient Persians believed Sapphires were a chip from the pedestal that supported the earth, and that its reflections gave the sky its colors.

Tradition holds that Moses was given the Ten Commandments on tablets of sapphire, making it the most sacred gemstone. Because blue sapphires represent divine favor, they were the gemstone of choice for kings and high priests. The British Crown Jewels are full of large blue sapphires, the symbol of pure and wise rulers.

The guardians of innocence, Sapphires symbolize truth, sincerity and faithfulness, and are thought to bring peace, joy and wisdom to their owners. In ancient times it was believed that when the wearer of a Sapphire faced challenging obstacles, the gem's power enabled them to find the correct solution.

In India it was believed that a Sapphire immersed in water formed an elixir that could cure the bite of scorpions and snakes. Alternatively, if it were worn as a talisman pendant, it would protect the wearer against evil spirits.

The following legend is Burmese in origin and highlights Sapphires‘ connection with faithfulness: “Eons ago Tsun-Kyan-Kse, a golden haired goddess with Sapphire blue eyes, presided lovingly over the temple of Lao-Tsun. Everyday, the temple‘s chief monk Mun-Ha, meditated before the golden goddess accompanied by his devoted companion, a green-eyed cat named Sinh. One day the temple was besieged by a group of terrible outlaws. When they threw Mun-Ha to the floor, Sinh leapt fiercely at the bandits, jumping up on his master‘s chest to protect him. The wrong doers fled screaming in fear, never to return and in gratitude for his courage, the golden goddess awarded Sinh with her Sapphire blue eyes. To this day, Sinh‘s ancestors guard over the temple.” The temple still stands and is populated by Siamese cat‘s with striking blue eyes (typically this breed has green eyes).



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