Really resilient material, most effective for gem safety (prongs don't bend or break quickly) Could be expensive By subtracting different quantities of the h•-Fe3+ absorption spectrum from the spectrum in the second measurement space, we are able to determine that its focus is close to six ppma, the very best https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share