Modern design is characterized by clean lines and crisp finishes. But if you're looking to spice up a contemporary interior, these seven interior finish selections from ARCHITECT assistant editor of products Selin Ashaboglu are geometric gems.

Bright folded metal shelves in red, white, black, or lacquered brushed steel finishes, co-created by Montreal-based industrial designers Tat Chao and Michelle Beaudoin, brings zig and zag to the walls.

Geometric, hand-dyed leather textiles from Brooklyn, N.Y.–based studio Avo’s newest collection, Intersection, can be used as rugs, upholstery, or wall tapestries. Or hand-embroidered wool rugs from Belgian designer Charlotte Lancelot’s line of furnishings piece together four distinct square and rectangular swatches for a patchwork of patterns.

Ceramic tiles, like a collection from Los Angeles–based designer Kelly Wearstler for Ann Sacks, bring expressive linework in a variety of colors to a kitchen or bath.

If you want to get really funky, a retro collection of puzzle tiles by London-based industrial design firm Barber & Osgerby can be mixed and matched to create unique floor designs.

See more of the interior product selections at ARCHITECT.

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