Don MacRostie, widely known for his Red Diamond mandolins,
has been building them for 50 years. For the past 20 years his focus
has been on making mandolins that incorporate the essence of the
Lloyd Loar signed mandolins of the early 1920’s.

For forty years Don was a major part of the Stewart-MacDonald
crew designing and producing parts, supplies and tools for the
lutherie community. In this capacity at StewMac, he had his hand
in the design and production of the instrument kits and plans,
resurrection the 3-ply maple banjo rim, and many of the lutherie
tools sold by StewMac today.

Over the years he has been an active member of the Guild of
American Luthiers and A.S.I.A. presenting at many symposiums,
and mentoring aspiring instrument builders. For sharing his
knowledge and for his artistic achievements, he was recognized in
2022 by the Ohio Arts Council with an Ohio Heritage Fellowship.