Epidote, Siderite, Prehnite & Fluorite Martin Marietta Hickory Quarry Catawba Co., North Carolina Price: $24.00 ID Code = Epi-0001     Click on each picture to enlarge This specimen collected from the Martin Marietta Hickory Quarry is composed micro to thumbnail dark sparkling green epidote and purple fluorite with siderite and prehnite on "Cat Square Granite". While none of the minerals are spectacular, the presence of all four minerals on the same rock make it quite an excellent location piece. The dimensions of the rock are 8-1/2" long by 5" wide by 4" thick. Click Here for field trip report when this very specimen was collected.