A woman from Colorado, Bobbie Oskarson of Longmont, has discovered an 8.52-carat diamond, which she initially mistook for a quartz crystal due its size and shape, in a state park in Arkansas. The gem, which a park staffer confirmed to be a diamond, was discovered in the Pig Pen, a 37-acre search field located within the Crater of Diamonds State Park. The name “Pig Pen” is derived from the terrain within the search field, as it becomes muddy when it rains. The white diamond, roughly half the size of a quarter, is the fifth-largest diamond discovered by a visitor of the state park since 1972, Colorado’s Channel 2 News reported. Ms. Oskarson, who plans to keep the gem, named it after her niece. She calls it the Esperanza Diamond. Park interpreter Waymon Cox was quoted by CNN as having said in a press release that “rain” and “regular plowing of the search field” increases the chances of visitors finding diamonds in the search area.