The Rochester Academy of Science (RAS) Mineral Section will have a Field Trip to the Penfield Quarry for their Open House from 6:45 a.m. to 12 p.m. "Hard hats (children may wear bicycle helmets), safety glasses, sturdy foot-wear, and long pants required. Expect to find fluorite, calcite, selenite, sphalerite, dolomite, gypsum, galena and fossils." [source: Rochester Academy of Science events page, 2015-Apr-27]