Rinse blueberries, spread on paper towels and pat dry. Line a baking sheet with wax paper or parchment. In a small bowl or the top of a double boiler, over barely simmering water, place chocolate; stir until melted. Remove bowl from hot water; gently fold in blueberries. Make clusters by spooning 4 or 5 warm chocolate covered blueberries onto wax paper, placing them 1 inch apart. Or spoon mixture into silicone candy molds.* Refrigerate until firm, about 30 minutes. Transfer to an airtight container and refrigerate for up to three days. For gift presentation: place clusters in pleated paper candy cups and arrange in box.

* Silicone candy molds can be found at craft stores.