THE WORLD STONE EXPERTS SPS Stone Group is the leading expert in providing quality stone and quartz surfaces for commercial, governmental and institutional construction projects and monuments. Founded in 1988, SPS has extensive experience in natural stone and quartz selection, construction and engineering. We have worked on over 500 commercial stone and quartz projects over the years. We are focused on providing quality products and first-class service, on time and within budget. President, Sterling Paul Shand, travels the world seeking out the highest quality stone/quartz at the most affordable prices. We assist and advise architects/designers, building owners, construction managers, and general contractors on complicated stone and quartz installations for the interior and exterior of buildings.