RDAs top priority, since its establishment has been uncompromising quality of the highest possible standard. RDA has placed the highest standards of quality and value at the forefront, in order to deliver the finest gemstones available to their clients. The rough materials used originate from a plentiful and high quality mine, and undergo meticulous selection in order to use only the best specimens. RDA only uses legal methods throughout the entire processing procedure, ensuring quality and durability of their gemstones. RDA provides only the highest quality sapphires: EXTRA AAA AA A A detailed certificate is included in every order, on behalf of RDA, ensuring the quality of the stone and its specific characteristics, and when necessary a gemological certificate is also included.