Biennial competition lauds 12 projects with exterior natural-stone use.
Initial penalties increase by nearly 20%, however.
AMC of Wisconsin seeks big share of state, regional market.
Art installation in support of CarraraMarmotec trade event.
Winners in the inaugural program take home $10,000 total in prizes.
First major change in green-building ratings system in five years.
Dec. 5-6 session to tackle stone, quartz face polishing.