Apart from these the other characteristics that should be considered for diamonds are:

• Apart from the above-mention characteristics, one can check if given stone leaves colour or has residues on rubbing it. 

• Only microscopic natural inclusions will be there in original Diamond and that would be very very less if any. The gas bubbles, scratches, cuts, blemishes, etc are seen in fake stones.

• Try to scratch the stone from a key or hard material. Original stone won't get scratched as it is the hardest substance out there. If the given stone gets scratched easily then it's probably the fake one.

• The Water Test: A real diamond has a high density. So if it floats at the surface of the water or underneath in a beaker or a glass, it is probably a fake stone. A real diamond would sit at the bottom of the glass or a beaker due to high density.

• If you are getting the diamond at a cheaper price, then it is 99% fake as natural and original ones are expensive. While the synthetic diamond comes in 20% the lesser price, the fake one can be bought for 90-95% cheaper than the original one. So beware!

• Diamonds quality depends on the 4C's i.e. Colour, Clarity, Cut and Carat weight. Diamonds which are bought by the experienced diamond graders are to be trusted than any other cheaper version.

• Last but not the Least, Seek professional help when in doubt and buy certified stones always.

Apart from these the other characteristics that should be considered while choosing a Blue sapphire gemstone are:

• Apart from the above-mention characteristics, one can check if given stone leaves colour on rubbing it. Original red coral will not leave colour on rubbing it off against any other material.

• The colour of the original stone should not be too dark or vivid.

• Keep the stones in your hand. If it starts feeling warm or hot, then it isn't the original one.

• Red coral is a fragile stone and is also heat and chemical sensitive. So if you get any harder stone resistant to heat and chemicals, it is probably the fake one.
• 
  

• No inclusions will be there in original red coral. The scratches, cuts, blemishes, etc are seen in fake stones. 

• If you are getting the red coral at a cheaper price, then it is 99% fake as natural and original red corals are expensive. While the synthetic red coral comes in 20% the lesser price, the fake one can be bought for 90-95% cheaper than the original one. So beware!

• Last but not the Least, Seek professional help when in doubt and buy certified stones always.

• Should Strictly be worn only after the consultation by the learned astrologer.

• Should be worn on Saturday of waxing moon period (Shukla Paksha).

• Should be worn in between the two hours before and after the sunrise.

• The best metal to wear it in is Silver, Platinum or White Gold. Those who can't or don't want to imbibe it in can make it in Panchdhaatu (an alloy of 5 elements Gold, Silver, Iron, Zinc and Copper. Sometimes Tin or Lead can be used in place of Zinc).

• The finger to wear it in is the Middle finger. Commonly it is worn in the right hand but which hand is preferred, you may check it out in my previous blog- https://www.thehailphoenix.com/2020/03/astrology-and-gems-selection-criteria.html

• Apart from the above-mention characteristics, one can check if given stone leaves colour on rubbing it. Original ruby will not leave colour on rubbing it off against any other material.

• Only microscopic natural inclusions will be there in original ruby. The gas bubbles, scratches, cuts, blemishes, etc are seen in fake stones.

• Try to scratch the stone from a key or hard material. Original ruby won't get scratched that easily. If the given stone gets scratched easily then it's probably the fake one. 

• If you are getting the ruby at a cheaper price, then it is 99% fake as natural and original rubies are expensive. While the synthetic ruby comes in 20% the lesser price, the fake one can be bought for 90-95% cheaper than the original one. So beware!

• Last but not the Least, Seek professional help when in doubt and buy certified stones always.

• Obviously, check for the above- mentioned characteristics. 

• Keep the yellow sapphire in milk for 24 hours. The original one will retain the same colour and lustre.

• It gives the yellow hue to the spot where the sunlight is reflected when it is placed on the white cloth in the sun's exposure.

• The best original stone (very rare to find) can actually cure the snake's bite when rubbed immediately on the area concerned.

• Should be worn on Thursday of waxing moon period (Shukla Paksha).

• Should be worn in between the two hours before and after the sunrise.

• The best metal to wear it in is Gold. Those who can't or don't want to imbibe it in gold can mane it in Panchdhaatu (an alloy of 5 elements Gold, Silver, Iron, Zinc and Copper. Sometimes Tin or Lead can be used in place of Zinc).

• The finger to wear it in is the Index finger. Commonly it is worn in the right hand but which hand is preferred, you may check it out in my previous blog- https://www.thehailphoenix.com/2020/03/astrology-and-gems-selection-criteria.html

• You can either wear it as a pendant, bracelet or a ring.

• Preferably it is worn in as a ring.

• Dip it in a Panchamrit (a mixture of raw cow milk, cow fat i.e Ghee, honey or sugar, yoghurt and Gangajal i.e. Holy water) one night before the morning you wanna wear it.

• In the morning, do your prayer rituals as you do in routine. Wash the ring with regular water and dip it in holy water just before wearing it.

• Always seek blessings of Almighty and pray to them for the fulfilment of the purpose for which you are gonna wear the gemstone.

• The "Beej Mantra- Ohm Graam Greem Graum Sah Guruve Namah" should be recited 108 times while wearing it to activate the stone.

• Since it has yellow colour as its cosmic light rays. It is good if you donate yellow cloth to your Guru or teacher. Feed yellow gram to a cow. And feed yellow sweets to the poor and needy.

• If it is possible for you then it is advisable to abstain from non-vegetarian food. As Yellow sapphire is a very pious stone and the Planet Jupiter is the Devguru i.e. Teacher of Gods, hence it is one of the Sattwika Planet.

• Keep your stones clean. 

• Normally, the life-stones and fortune stones are prescribed.

• Gemstones of mutually inimical signs should never be worn together. For example, Jupiter and Venus are mutually inimical signs, therefore, Yellow sapphire or topaz should never be worn along with Diamond.

• Utmost precaution to be taken while prescribing the gemstone and by the wearer also. If any planet is inimical to the Lord of the Lagna i.e. Ascendant lord, its gemstone or mantra can further elevate the problem rather than improve especially related to the house owned by the planet. For example, if the lord of the fourth house is inimical to the Lagna lord, then its related gemstone can reduce the materialistic and domestic happiness of the wearer.

• Generally, if a gemstone is prescribed to enhance the positive effects of the beneficial planet in the chart, it is to be worn in the right hand. If the gemstone is being worn to reduce the ill effects of the malefic planet, it should be worn in the left hand. This is the general outlook. It may vary as per the chart and the astrologer.

• It is usually advised not to consume non-vegetarian food in order to fetch maximum results from the gemstone. It becomes all the more significant when native wears Sattwika Graha (pious planet) gemstones such as yellow sapphire. 

• Generally, the planet which is exalted, in the houses such as angle or trine and is friendly to the Ascendant lord gives very beneficial effects if its gemstone is worn along with the gemstone of the Ascendant lord. For example, if the Ascendant(Sagittarius) Lord is Jupiter and the Sun is placed in the 5th house under Aries sign. In this position, Sun gets exalted in the Aries and being in one of the trine houses, becomes benefic. Also, it is a friendly sign to the Ascendant lord Jupiter. Hence, wearing Yellow sapphire(for Jupiter) and Ruby(for the Sun) gives synergistic benefic effects to the native.

• Buying from the trusted vendor or gemologist is very important towards wearing any gemstone. As there is no use of investing even a small amount of money in fake stones.

• Ask for the lab certificate with the gemstone you buy. Try not to invest in uncertified gemstones.

• According to me, the sheer wearing of gemstones would do no good unless you recite the associated mantra with the respective gemstone you wear. Every gemstone has a few sets of mantras related to it. One should practice giving at least 2-3 minutes of recitation of the same to activate the gemstones and yield the desired results.

• Last but not least, always seek proper guidance from a learned and experienced astrologer or gemologist before wearing any gemstone. As the good astrologer would thoroughly analyse your birth chart and then advise you on the perfect gemstone according to your desired purpose.