Planet: Saturn (Shani)
If the Sapphire (Neelam) has white lines on it, it is bad for the eyes. The whitish (milky) stone brings poverty. A cracked blue sapphire brings accidents to the native. The dual coloured stone may cause troubles from the enemy side. The dull coloured Sapphire (Neelam) causes distress and worries to nears and dears.
There are also following beliefs about this stone :

1.If the Sapphire (Neelam) is put in water and the same water is used to wash the scorpion bite, the effect of the poison is removed immediately.

2. If the Sapphire (Neelam) it is worn as a talisman, it gives protection from evil spirits.

3. The Sapphire forewarns its owner by changing its colour if there is any conspiracy or threat of an attack on him by his or her enemies.

Planet: Ketu

The Cat’s Eye having a yellowish radiance and a white band belongs to the superior class of such gemstones. The stones having a depression, spots, mica mixed, having a web, or which are dull, are treated as defective and should be avoided for remedial purpose. Wearing of a Cat’s Eye gives happiness in the matter of children and makes the wearer wealthy. It is a restorer of lost wealth. Cat’s Eye is a quick acting gemstone and should always be worn after a trial. A blemished stone proves harmful. The stone with spots causes trouble from enemies and that with depression creates stomach disorders. The dull stone is bad for health. A Cracked gemstone gives injuries. The stone with a black dot or spot is likely to prove fatal to the wearer.

Planet: Venus (Shukra)

It is the most expensive gemstone in the category of gemstones. The most auspicious diamond is one that is colorless with a blue tinge or one, which sprays blue and red rays and is without black dots. The Diamond with a red or yellow hue or tinge is said to be beneficial and auspicious for kings, political leaders and astroadmins. The Diamond having a white hue is suitable for religious, social and spiritual works. The Diamond of yellow hue showers success and prosperity. The Diamond of black hue is suitable for people who are engaged in inferior jobs or professions. Women desiring birth of sons to them should wear an unblemished white Diamond having a slight black hue. The wearer of Diamond is protected from the bad influences of evil spirits, and snakebites. A defective or blemished Diamond causes great harm to its wearer. The Diamond with the shape of island, is white, destroys wealth and happiness, and the one with the black Yava destroys wealth. Other defects disturb mental peace and bring disasters and diseases.
Inauspicious Diamonds:

a) Dots: The appearance or an impression of a dot on the Diamond is a major flaw in the diamond. Black dots are considered inauspicious in a diamond. White dot is considered acceptable.

1.  If there are dots like the criss crosses then such diamond is considered inauspicious and is believed to bring death to its wearer.
2. If the yava shaped dots are on the diamond then it becomes inauspicious except when the dots are white in color.
3. If there is dirt in the corners or center of the diamond, even then it becomes inauspicious.

Planet: Rahu

HESSONITE OCCURS in a very wide range of hues – colorless to black- but drives its name from the first specimen ever found, a distinctive gooseberry-green color. The orange-brown color of hessonite is due to manganese and iron inclusion. The best Hessonite (Gomed) is found in Sri Lanka in metamorphic rocks or gems gravel and sands. In Madagascar, Hessonite is often referred to as Cinnamon Stone. Other localities include Brazil, Canada and Siberia (Russia) as well Marine, California and New Hampshire in USA.

Planet: Mercury (Budha)
Emerald is considered an expensive gemstone. Most of the Emeralds have cracks, which reduces their value. A pale shade is not as valuable as is the emerald having deep velvet green to having a shade of grass green. It is difficult to find a flawless Emerald. A good Emerald is smooth and transparent and emits bright rays, and is without any dots or spots, this type of stone is considered most auspicious gemstone. An Emerald of good quality and without blemishes gives good health, a strong body to its wearer. Apart from this, it also makes him wise and intelligent. It increases wealth and property of the wearer and blesses the native with children. It gives protection from the bites of snakes, it also protects native from evil. It is also considered beneficial for good eyesight. It ensures safe and painless delivery for pregnant women. An Emerald, which is blemished causes injuries, deprives happiness from parents, causes mental and physical distress to the wearer.

The Following Are The Flaws Found In Emerald:

1. Cracks
2. Brightness
3. Haziness
4. Dual coloured
5. Without any lustre
6. Spots of any colours
7. Brittlenes

Planet: Moon (Chandra)

It is firmly believed that wearing of pearl ensure happy conjugal life and protection from widow-hood. Anybody wearing an unblemished Pearl earns riches and is blessed by goddess of wealth Lakshmi. He or she lives long and all his sins are said be washed away. He gets vitality, becomes intelligent and achieves a high position in life. Pearl with a yellow luster brings wealth. Reddish pearl makes one intelligent. White Pearl bestows fame and the Pearl with blue hue is the giver of good fortune. The wearing of a defective pearl brings troubles. The Pearl, in which there is spot without luster like the hole, that pearl, is likely to cause leprosy to the wearer. If in any pearl there is a spot or sign looking like the eye of a fish, the wearer suffers loss of children. The Pearl, devoid of luster is said to shorten life. The Pearl that is flat brings a bad name to the wearer. The Pearl that is long instead of being round makes the wearer foolish and an idiot. If a side of the Pearl is broken, the wearer of such stones suffers the loss of his livelihood.

The Following Are The Flaws Found In Pearls:

1. Cracks on surface
2. Lines on the body of the Pearl
3. Joint like appearance
4. Mole of black colour, the wearing of such Pearl gives very inauspicious results
5. Without any luster
6. With spots
7. One with dirt inside it

Planet: Jupiter (Guru)

Jupiter rules the Pukhraj or Yellow Sapphire. It is of yellow color and whatever class it belongs to, it is used for getting the benevolent blessings of Jupiter.

An unblemished yellow sapphire (often-called Topaz, a substitute semi-precious stone) gives the wearer, good health, wisdom, property, longevity, name, honors and fame. The wearer is blessed with children. It gives protection from evil spirits. It is believed that if there are obstructions in getting a suitable match for a girl, she gets married early by wearing a yellow Sapphire. Blemished gemstones are the cause of many troubles. A stone with cracks invites threats or theft. One without luster and transparency creates enemies and causes disharmony in the family. A milky stone invites injuries to the body. The one with a web causes stomach disorders. The one with red dots on it destroys wealth. The stone with a depression causes anxiety and disturbs peace of mind.

Planet: Mars (Mangal)

The wearing of a Red Coral (Moonga) makes the native courageous and a conqueror of his enemies. It is believed that the genuine Red Coral warns the wearer of coming ill health by changing its color. The Red Coral prevents from bad dreams and nightmares. It protects the wearer from evil spirits. A good and auspicious Coral possesses the following merits:

1. It is of an opaque red pigment of cinnabar or the Bimb” fruit. It is perfect
2. It is perfectly round or oval
3. It is very regular in shape
4. It is without any hole
5. It is smooth

The Following Are The Flaws Found In Pearls:

1. There may be a black or white spot in the composition
2. There may be a crack on the surface on in the body
3. There may be more than one shades of color in the same piece
4. There may be a depression, bend or twist on the surface

Planet: Sun (Surya)

The name Ruby is derived from the latin word rubeus, meaning red. Frequent twinning of the crystal makes Ruby exposed to fracture. Yet it is a tough mineral, second only to diamond in hardness. Ruby is found in igneous and metamorphic rocks or water-worn pebbles in alluvial deposits. The finest stones come from Burma followed by the brownish red variety of Thailand. Afghanistan, Pakistan and Vietnam produce bright red stones. Those from India, North Carolina (USA), Russia, Australia and Norway are dark, sometimes even opaque.

Colours: Red Pinkish, purplish and brownish red. Healing Properties: Ruby helps bring energy and spark back into life, spurring the lethargic into action. It stimulates the heart charka, filling our hearts with joy, spontaneity, laughter and courage. It instills in us a great passion and zest for life as well as confidence.