What better time than summertime to promote the eco-conscious looks of uncommon and organic materials such as wood, fossilized coral, mother-of-pearl, horn, and bone? Less precious than conventional jewelry, these repurposed beauties make a cost-effective statement ideal for the warm-weather months. Despite the challenge of working with sometimes-fussy materials (wood can break if overpolished), jewelers persevere in the ­studio to obtain results that are unpretentious, ­fashion-forward, and, best of all, environmentally friendly, striking the perfect balance between fine and costume jewelry—naturally.

1. Geometric Bangle with bird eye maple and sterling silver inlay; $2,200; Patricia von Musulin, New York City; 800-243-5596; pvmonline.com

2. Terrain aragonite natural crystal cluster from Morocco with reclaimed cherry wood, moonstone, recycled and sterling silver; $790; Andrea Rosenfeld, Morganville, N.J.; 732-705-1567; andrea-rosenfeld.com

3. Ring in imbuia wood with 5 ct. rutilated quartz and 18k white gold prongs; $1,750; Mauricio Serrano, Lomas de Chapultepec, Mexico; 52-55-5203-3520; mauricioserrano.com

4. Fossilized coral earrings in 18k rose gold and stainless steel with 6.60 cts. t.w. multi-color sapphires, 1.43 cts. t.w. brown diamonds, 0.16 ct. t.w. rose-cut diamonds, and 0.20 ct. t.w. brilliant-cut diamonds; $11,450; Federica Rettore at Rock House New York, New York City; 917-553-5360; federicarettore.com

5. Twig bracelet of cocobolo wood cabochons and 18k yellow, white, or rose gold with a Jundah opal; $20,000; K. Brunini Jewels, Solana Beach, Calif.; 858-259-8779; kbrunini.com