Black Rock Galleries is holding online auctions including the Darien Online Auction and the Apex Late April Multi-Estate Online Auction @BRG-Raleigh Apex, which begin closing on Monday, April 20th, and the Fairfield Single Owner Jewelry Online Auction @BRG-Fairfield, the Rye Brook Single Owner Online Auction, and the Fairfield April Multi-Estate Online Auction @BRG-Fairfield, which begin closing on Tuesday, April 21st.