Squares can look like diamonds tilted in a different direction. And when the two shapes are patterned in a singular painting — and joined by other basic shapes that overlap and coalesce — the result can be a thing of minimal beauty. So it is with Jacob Melchi, whose new "diamond" canvases are on display at George Lawson Gallery in "nothing is plural: paintings." The exhibit opens with an artist's reception. It's a chance to meet a Los Angeles painter whose new oil works — with titles like Diamond 13 (Stripes) and Tilted II and Eclipse (Yellow) — prove again and again that basic dimensions can please the eye and evoke a keen sense of both mystery and joie de vivre. Opens with an artist's reception 4-7 p.m., Jan. 4.