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.
Collagen occurs throughout the body, but especially in the skin, bones, and connective tissues. Some types of collagen fibrils, gram-for-gram, are stronger than steel. Collagen production declines with age and exposure to factors such as smoking and UV light. Collagen can be used in collagen dressings, to attract new skin cells to wound sites. Cosmetic lotions that claim to increase collagen levels are unlikely to do so, as collagen molecules are too large to be absorbed through the skin.