About Valampuri Sangu

Dakshinavarti Shankh, Valampuri Sangu [in Tamil] or Sri Lakshmi Shankh, is a sacred Hindu object otherwise known in English as a conch shell. This is the shell of a large sea snail from the Indian Ocean (a shell of the species Turbinella pyrum), but one that has the very rare reverse-turning spiral.
In other words, when it is held with the spout (siphonal canal) pointed up, this conch's spiral twists rightwards (dakshinavarti) rather than very much more common form, which twists leftwards (vamavarti)

True vs. fake
The genuine Lakshmi Shank is a sinistral conch shell from the Indian Ocean, and certainly not a sinistral whelk species from Florida, USA. A true Valampuri shell is a species under the gastropod genus Turbinella L. The most common species is Turbinella pyrum L.
It is important to note that only sinistral variety of Turbinell species is a true Lakshmi Shankh. This shell is rare in its occurrence. Other right-turning sea snail shells of a similar shape such as the lightning whelk Busycon perversum, are often mistakenly sold and worshiped in place of the genuine Shank.
The real Lakshmi Shank has 3 to 7 ridges or plaits on its columella, whereas whelk shells does not show the presence of such plaits on its columella. The so called flower bud opening test, rice pulling test, Valampuries coming up through the rice heap are non scientific and are gimicks.
Valampuries show much morphological variations depending on its natural locality. Shells with mixed characters of two adjacent localities are also seen.
Origin
While genuine Dakshinavarti Lakshmi Conches are only found in the Indian Ocean, between Myanmar (Burma) all the way to Sri Lanka. There are three main localities of this shankh in India. Shells from all the localities show definite morphological variations. The three localities are Indian Ocean near Adam's Bridge (Ram Setu), Sri Lanka, Ramishwaram to Tuticorin. Shells from this region are rare in occurrence. The second locality is Arabian Sea or Western India. The third locality is Bay of Bengal. Varieties showing mixed characters have also been observed.
The imitation (Lightning Whelks) mostly come from Florida and the Gulf of Mexico. This imitation is also known as African Valampuri.
Rarity
Real Lakshmi Conch (right side spinning) are estimated to occur only one per 100,000 conch shells. The shell of the lightning whelk on the other hand almost always opens on the right. Valampuries with five plaits or folds in its cavity are known as 'Panchajanya' and are very rare. Completely snow-white Valampuries are also very rare and expensive.
Powers ascribed
The Lakshmi Conch is said to bring all manner of blessing, but particularly material wealth, upon the owner. Ritual use may include bathing deities, drinking from the conch, or the use of mantras oriented to goddess Lakshmi.
Siddha Dakshinamukhi Shankha
Beneficial for wealth, peace, prosperity, wealth, money and materials Dakshinavarti Shankh is rare lucky charm. This Dakshinavarti Shankha is a Sea-shell which opens towards the right hand, and is extremely rare with lot of spiritual significance, because Sea-shells that open towards the left hand are very common. Dakshinavarti Shankh / Dakshinamukhi Shankh is a rare one and is also called Vishnu Shankha.
This Dakshinavarti Shankh saves a person from all troubles and problems, removes hurdles and fulfills all wishes and offers money and materials. The sea shell which open towards left hand are commonly available but rare the seashells which open towards Right Side. Shells are obtained from the water-animals especially form snails, which live in the seas. Dakshina means the south side or when holding the Shankha , Right Side.
Therefore it known as Dakshinavarti Shankha. Dakshinavarti Shankha is available in white color and with brown lines on it. Dakshinavarti Shankha is the symbol of Maa Lakshmi. Goddess Lakshmi photo always depicts Dakshinavarti Shank in her hands. Dakshinavarti Shankha Shankha shall be kept in Puja Ghar or Locker during any lucky occasion or festival, Dakshinavarti Shankha brings good luck and wealth to the individual and his family.
In the Puranas, the gods and goddesses are depicted as holding a shell, whenever they are happy or setting out on war. Whenever the shell is blown it is said to purify the surroundings form all evil effects. Even the scientists have agreed other fact that the blowing of a conch increases the positive qualities in the atmosphere such as courage, faith, determination, dedication, optimism, etc. It is always recommended that each house shall have Dakshinavarti Shankha for wealth, prosperity and Good Luck.
It is believed that who keeps this Shell in their locker , they would never face any dearth of money in there life. Dakshinavarti Shankha shall be kept on white cloth in Puja Ghar/ worship place or Wrapped in white cloth, if need to be kept in locker. One shall light incense in front of Dakshinavarti Shankha and offer white rice and milk.
Ordinarily the conches are Vamvarti i.e their bulge opening towards left side (facing North). Some shells are Dakshinvarti, their bulge opening towards the right surface i.e facing south and even their spiral lines run towards the right . South is the direction of Kuber, the God of wealth, Tantrik Shastra has given great importance or such types of shells. Dakshinvarti shells are very rare and are found only in a hardly any places .
Their sizes be different, starting form the size of a wheat gram or as large as coconut. Mostly these shells available only at Kenya Kumari. A completely white colored-one is extremely rarely found. Dakshina varti Shankha not only bring wealth but also purifies the environment. All the negatives energies are drain out of the place.
Available size:- 1.50" x 2.50", 3"x5" , 5"x 7"
Benefits of Dakshinvarti Shankha
Prosperity to the house or office
No shortage of groceries, money or clothes.
Brings peace to the premises.
If kept in the bedroom, it brings a good relationship among the couple.
If kept during a spiritual get together, it brings awareness by evoking Deity Saraswati.
Enlightens the students with skill and sharpens their memory.
Fill it with Ganges water and sprinkle it on a person or in a premises. Malefic planetary effects and black magic evils disappear.
Removes ill-effects of Brahmhatya, Gau-hatya and Bal-hatya (Dosha due to killing of a priest, cow or kids in the previous births).