Gemstone was a Sea Sprite 23, hull number 713, built in 1980 by C.E. Ryder. I checked the hull number, located on the top right corner of the transom, but one of the numbers was missing. It appeared to have been filled in at some time. The number was CERSS71?M80H. Fortunately, I had what appeared to be the original sails and they had the (hull) number 713 printed out them.
I purchased the boat on 19th May 2001 from Peter Richens, who had owned the boat since about 1986.
Gemstone was destroyed by Hurricane Karen in November 2001. I only owned her for six months but I enjoyed her for that brief time.