Customized Hand Stamped Name Necklace with Heart Stamped Charm

Aluminum, copper, stainless steel 316 (not plated) Tibetan Silver.

Aluminum
If you have reactions to nickel, brass, copper, or even sterling silver, aluminum is the way to go! Our aluminum is so safe, you could eat off it (though I don't recommend putting food on your jewelry!). It has a lower reaction rate than sterling silver, won't turn your skin green, oxidize or tarnish in any way.

Cooper
When it is exposed to air, it darkens or tarnishes, forming what is commonly referred to as copper “patina.” After prolonged contact with human skin where it can interact with air, sweat and other chemicals, such as soaps, lotions and makeup, copper can turn green or bluish-green, and stain the skin in the process.
How to Solve the Problem

Clean the piece of jewelry by either washing with soap and water, or by wiping with rubbing alcohol. Dry immediately and thoroughly.
Coat either the entire piece or just those areas that touch your skin with one of the following:
just applied periodically car wax, applied and buffed according to the container's instructions.
Coating your jewelry with one of these barriers has the added advantage of protecting the jewelry from tarnishing, or at least slowing down the process.

Tibetan silver is used primarily in jewelry components, and is similar to pewter – an alloy of copper, and sometimes tin or nickel, with a small percentage of pure silver. Its overall appearance is of aged silver, but it can be polished to provide highlights on complex castings. Today, the nickel content is reduced or absent, due to common allergies to this metal.

Properties of Stainless Steel Jewelry
Stainless steel has many characteristics that make it a good choice for jewelry, but some special properties make it especially useful for some wearers. When choosing jewelry, consider how and where it will be worn. Stainless steel may be the right choice even over precious metals for some wearers.

Low Reactivity
The chromium oxide film that prevents tarnish and rust from forming on stainless steel also keeps it from reacting to many other chemicals. Environments that contain a high chlorine or salt content can accelerate tarnish in silver, but they do not affect stainless steel. For divers, swimmers, and other aquatic athletes, stainless steel jewelry is an excellent choice. Those who must regularly wash their hands will find rings that are impervious to regular immersion in soapy water a benefit. While all stainless steel has a small amount of nickel, the alloy does not generally trigger a reaction from metal-sensitive skin, which is why it is used in surgical instruments and medical implants. Those who find that other costume jewelry stains their skin often find stainless steel jewelry an inexpensive and attractive option.

Resistance to Tarnish
Jewelry that never needs polishing is a boon to those who prefer low-maintenance accessories. Steel jewelry with intricate details may need occasional cleaning in an ultrasonic jewelry cleaner or with a polishing cloth, but it does not need regular buffing or tarnish removal. Wearing sterling silver is one of the best ways to keep it free from tarnish, but stainless steel jewelry will remain new-looking even after spending months in a jewelry box.

Excellent Durability
For anyone who is hard on fine jewelry in more malleable materials, stainless steel jewelry is an excellent choice. It will not readily warp or lose its fine detail to nicks and scrapes. Brushed and satin finishes retain their luster longer when wrought in harder metals. While fashion jewelry may be changed out regularly, pieces that are worn every day such as wedding bands or medical alert ID jewelry must be sturdy enough to withstand years of use.