Huge, transparent, gem-quality crystals are found there. Topaz has also come from the Ural Mountains of Russia, Mexico and the U.S. (Texas, Colorado and Utah). Topaz is often confused with the less valuable citrine. Topaz is a very hard gemstone but it can be split with a single blow, a trait it shares with diamond. Any Topaz labeled with a prefix name (such as Gold Topaz, Madeira Topaz, False Topaz, Brazilian Topaz, Bahia Topaz, and Citrine Topaz) is heat-treated Citrine.
Dietary collagen is available from the following sources: 1  Piscine (fish). 2  PROS: Collagen peptides from fish are considered to be superior in raising overall body collagen (Type 1) and improving skin, hair, nail, and bone quality. 3  CONS: Fish collagen peptides generally cost more than other sources of collagen.
80-90% of collagen in the human body consists of types I, II, and III collagen, although at least 16 different forms of the protein are known. Gram for gram, type I collagen is stronger than steel! Collagen used for medical purposes need not be human collagen. The protein may also be obtained from pigs, cattle, and sheep. Collagen may be applied to wounds to serve as a scaffold on which new cells can form, thus improving healing. Because collagen is such a large protein, it is not absorbed through the skin.