Diamond is the gemstone of Venus. It will be beneficial for natives in whose birth chart Venus is lord of auspicious houses.

Emerald is ruled by Mercury. Natives having mercury as obtaining lordships of auspicious houses will do very well if they wear emerald. If Mercury is badly disposed or is inflicted by, conjunction with or aspect by malefic planet then emerald will neutralise the evil effect of such adverse influences.

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.

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

Pearl is the gemstone ruled by Moon. It is a suitable and gainful gemstone for those in whose nativities Moon is lord of an auspicious house or when as lord of an auspicious house is afflicted or not well placed in the birth charts.

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. A 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.

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

Red coral is the gemstone of Mars (Mangal). A person in whose birth chart Mars is lord of an auspicious house should wear coral. If Mars is lord of the inauspicious house in a birth chart, it will be harmful for the native to wear Red Coral.

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.

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.