Star-sapphire himself, Martin P. Steinbach, from Idar Oberstein in Germany.
Martin Steinbach is a world renowned expert on gemstones with asterism and is
the author of one of the most magnificent gemstone books in modern time, the
impressive 900+ pages "Asterism, Gems with a star" and runs the site
Martin P. Steinbach graduated in 1982 from the German Gemological Association (DGemG) as a Gemologist and is a Fellow of the Gemological Association of West Germany (FGG), and he graduated as an „Accredited Gemologist“ (A.G.) in 1983 with the “Asian Institute of Gemological Sciences” (AIGS) in Bangkok, Thailand. In 1982 he received a Diploma as a Diamond-Expert with the DGemG in Idar-Oberstein.