You can wear gemstones in neck as pendant/Locket or in fingers as ring.

Auspicious Day, Metal and Finger in which you should wear your Gemstone

Ruby (Manik): Wear on Sunday, Gold or Copper, Ring Finger
Pearl (Moti): Wear on Monday, Silver, Little Finger
Yellow Sapphire (Pukhraj): Wear on Thursday, Gold, Index Finger
Diamond (Heera): Wear on Friday, Silver or White Gold, Middle Finger
Red Coral (Moonga): Wear on Tuesday, Gold or Silver, Ring Finger
Emerald (Panna): Wear on Wednesday, Gold or Silver, Little Finger
Blue Sapphire (Neelam): Wear on Saturday, Gold, Middle Finger
Hessonite (Gomed): Wear on Saturday, Gold or Silver, Middle Finger
Cat’s Eye (Lahsuniya): Wear on Tuesday, Gold or Silver, Middle/Little Finger

Before wearing any gemstone you need to purify and energize it. If you powered your gemstone properly then it can increase the benefits and power of a gemstone greatly.

Mostly this procedure is only done by the experts. The experts call this procedure ShudhiKaran and Praan Pratishtha of the gemstone.

In case if you do not have any expert/pandit with you then you can follow simple method of it. You need to wash your gemstone on its auspicious day with GangaJal (Holy Water) or with raw Milk in a small bowl and after this step you need to recite “Gaytri Mantra” x11 times and blow on it, now your gemstone is ready to wear. If you are Muslim then recite “Bismillahir Rahmanir Raheem” x11 and wear it.

If the above method is not possible for you then you can do this method: Just go to a nearby temple and tell the Pujari (priest) to put your gemstone in legs of Lords for few seconds and now your gemstone is ready to wear.

Some gemstone causes some mental and medical side effects which usually can last for 10 to 15 days after wearing it for the first time. It takes some time to adjust so you need to keep wearing it.

Ruby (माणक)
Color of Gem : Reddish
Nature of Gem : Hot
Metal to be used : Gold/copper
Minimum weight : 5.00 carat/3.00 Carat
Planet it represents : Sun
Sub-stones : Garnet, Star Ruby, Sun stone, Red Agate

Diseases : Blesses a person with good health problem,
relieves headaches, indigestion

Yellow Sapphire (पीला पुख्रराज)
Color of Gem : Yellowish
Nature of Gem : Cold
Metal to be used : Gold
Minimum weight : 2.90 Carat
Planet it represents : Jupiter
Sub-stones : Golden Topaz, Smoky Topaz,
Lemon Topaz, Citrine

Diseases : A destroyer of diseases and negativity.
Should be worn for a healthy body and mind.
A cure for jaundice, diarrhea, cough, phlegm,
respiratory and chest-related problems. Particularly
recommended for those desirous of being blessed with children.

Pearl (मोती)
Color of Gem : Off-white
Nature of Gem : Cold
Metal to be used : Silver
Minimum weight : 3.50 Carat
Planet it represents : Moon
Sub-stones : Moonstone, Opal

Diseases : Cure for tuberculosis,
cough, bile, phlegm, dehydration, diabetes.
Improves memory, cures insomnia, uterine disorders,
breathing and digestive problems. Improves general health,
enhances complexion, beauty and charisma.

Red Coral (मून्गा)
Color of Gem : Reddish
Nature of Gem : Hot
Metal to be used : Silver
Minimum weight : 3.00 Carat
Planet it represents : Mars
Sub-stones : Orange Agate

Diseases : Helps in cure of anemia, allergies,
inflammations, bronchitis, tuberculosis, pneumonia,
measles etc. Cures malnutrition and inadequate
or slow development in children. Prevents abortion,
miscarriage or other pre-natal complications. Cures
mysterious diseases and blood infections & impurities. Stops nightmares.

Emerald (पन्ना)
Color of Gem : Greenish
Nature of Gem : Hot
Metal to be used : Gold
Finger for wearing ring : Pinkie finger
Day & Time of wearing : Wednesday, Morning
Minimum weight : 5.00 Carat/3.00 Carat
Planet it represents : Mercury
Sub-stones : Peridot, Jade, Onyx, Green Agate

Diseases : Improves eye-sight & memory, cures
stammering, reduces psychic fears, fickle-mindedness & harshness
in speech. Improves control over brain & nervous system,
digestion, liver, lungs, tongue & vocal chord. Is used as a cure
for hyperacidity, hepatitis, ulcer, asthma, bronchitis, insomnia,skin problem etc.
Caution : Emerald is not recommended for those suffering from allergies,
skin disorders, or epilepsy.

Diamond (हीरा)
Color of Gem : Transparent
Nature of Gem : Hot
Metal to be used : White Gold
Minimum weight : 0.25 Cents
Planet it represents : Venus
Sub-stones : White Sapphire, Zircon

Diamond is the King of all precious stones, and
considered the most beautiful, durable and precious of all.
Diseases : Most effective cure for sexual weaknesses,
sex-related problems and diseases of private parts.
Strongly recommended for sexual vigor, vitality, power & energy.
Cure for diabetes, STD, skin diseases, insomnia. Increases longevity.
Caution : Bad Diamonds produce negative energy and cause ailments,
tensions & depression. Should be of very good quality,
with pro-active positive spiritual energy. Only an Expert
Spiritualist or Astrologer can distinguish between Diamonds with positive or negative rays.

Blue Sapphire (नीलम)
Color of Gem : Bluish
Nature of Gem : Very Cold
Metal to be used : Gold
Minimum weight : 3.00 Carat
Planet it represents : Saturn
Sub-stones : Lolit, Lapis Lazuri, Turquoise, Amethyst,
Gun metal, Black star

Diseases : Protects the person against risks of accidents,
mishaps, disaster, and any unforeseen calamities. Heals
ailments like vomiting, nausea, headaches, body pains, boils,
allergies, abscess and hypertension. Grants relief from mental
agonies, miseries and frustration, and is known to cure alcoholism
and bad eating habits. Can cure heart disease in some cases.
Caution : Blue Sapphire should be worn only under guidance and
after consultation of an expert Gem Therapist. Extra care and caution
is required to carefully watch and monitor it’s affects.

Hessonite (गोमेद)
Color of Gem : Rust Brown, Deep Brown
Nature of Gem : Cold
Metal to be used : Silver, Penta Alloy
Finger for wearing ring : Middle finger
Day & Time of wearing : Wednesday, Morning
Ideal weight : 5 Rattis
Planet it represents : Rahu (Dragon’s Head)
Sub-stones : Amber

Diseases : Cures diseases of Rahu and Saturn.
Increases appetite and vitality. Improves general health and well-being.

Cat’s Eye (लेह्सुनिया)
Color of Gem : Two color
Nature of Gem : Very Hot
Metal to be used : Gold
Minimum weight : 4.00 Carat
Planet it represents : Ketu (Dragon’s Tail)
Sub-stones : Chrysoberyl, Eagle eye, Tiger eye

Diseases : Cure for allergies and skin disorders.
Relieves tensions and fears, and cures psychological
dysfunctions like mania, schizophrenia, depression etc. Helps cure paralysis too.