Try Gary B. Wilson, Lapidary Design Group, Summer address: P.O. Box
483, Traverse City, MI 49685, Phone 231-933-4892.
Or Winter address: 7778 N. Ancient Indian Dr., Tucson, AZ 85718
Phone 520-877-1066 He has the most incredible selection of cabs - I
have seen some unpolished (not the Lapis, but he might know a
source). I'd say he ought to know of the Michigan stone you are
requesting. He will be at the Denver Gem and Mineral Show Sept 13-16,
2007. I buy most of the cabs I use from him.
Rose Marie Christison