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18ct Yellow Gold
18 carat Gold is also a very good material for body jewelry and is readily accepted by most people’s body piercing, but it does not work well for all people. It is softer then metals such as Titanium, Niobium and 316L steel and some peoples skin can actually discolor the gold but it can easily be repolished back to its former lustre. Gold Body jewelry looks great and is very popular with "Gold People". 9ct gold only contains about 30% gold and therefore not suitable to be worn in most peoples body piercings.
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Niobium
Niobium is an element metal with similar properties of Titanium but its is not as light. It is Hypoallergenic so it works great for body piercing and the other exceptional property of Niobium is that it can be anodized to a wide variety of coolers.
Colored niobium rings, even though inert in the body, are not recommended for initial piercings. This is due to the need to rotate the jewelry through the piercing to properly clean it and that rotating can causes the color to wear thin, dull and patchy. The thickness of this color is between ½ and 1 one millionth of a centimeter thick! If you want to use anodized Niobium jewelry in your piercing then it is best that you wait until the piercing has fully healed. Highly polished, to a silver color, Niobium jewelry is a great choice for the initial piercing.
Niobium jewelry can also be colored to a Black/Hematite color. This surface is a lot more durable then the surfaces of the other colored Niobium jewelry.
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316L Grade Stainless Steel
316L Stainless Steel, often referred to as "Surgical Stainless Steel", contains some Nickel which quite a few people are allergic to. Some people’s piercings heal up fine with stainless steel, although it may considerably lengthen the healing time. This longer healing time may allow the jewelry to migrate from its original placement.
For wearing in fully healed piercings 316L Stainless Steel is usually fine. For some people however, if they use this jewelry then the piercing will become aggravated causing redness, swelling and pain. If this happens you may be able to correct the problem by replacing the Stainless Steel jewelry ASAP with the jewelry you wore to successfully heal the piercing.
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Acrylic
Acrylic often referred to as Perspex is also used for "Body Jewelry". Bead rings (which glow under "Black Light"), Barbells, Straws, Hoops, Tubes, Fishtails, Acrylic EarPlugs (Tapered and Straight) in many different finishes, sizes and colors.
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Platinum
Want to be extravagant then Platinum is the right choice for you, although very expensive, is a very good material to wear in your piercings! Platinum is a silver color and also inert in most peoples bodies.