Two silent art auctions are under way — and one of them will turn into a live auction next week if more than one person is angling for the same item.

Craft Center Staff Show and Silent Auction — This eighth annual event features jewelry, glasswork, textiles, ceramics, metalwork, woodwork, photography, painting, drawing, screen printing and mixed media, in the Craft Center Gallery, South Silo.

Written bids are being accepted at the gallery until 6 p.m. Dec. 4. The deadline comes amid the show's closing reception, from 5:30 to 7:30 p.m. As soon as the silent bid period comes to a close, a live auction will commence for any items with active bidders at the closing reception. Auction proceeds support Craft Center programs.

Nelson ARTfriends Fall Online Silent Auction — Offering several pieces of fine art by Hung Liu and Don Ed Hardy and others, and a wide variety of posters, some featuring the works of Robert Arneson, Roy De Forest, Wayne Thiebaud, Manuel Neri and William T. Wiley. For the posters, minimum bids range from $5 to $50, with most starting at $20.

People are invited to submit silent bids through midnight Dec. 16; or, each item also comes with a buy-it-now price. “If you win two or more auction items, you will receive an additional poster free,” said Katrina Wong, assistant to the director of the Nelson Gallery.

In other ARTfriends news, members are invited on a group visit to the Asian Art Museum in San Francisco on Dec. 13, for a curated tour of Emerald Cities: Arts of Siam and Burma. You are on your own for transportation. For information about joining ARTfriends, and/or more information about the museum visit, contact Wong, (530) 752-8500 or kliwong@ucdavis.edu.