Is this ring OK for a guy to wear?

a href="http://www.amazon.com/gp/product/B001PV65W0/ref=s9_simh_gw_p197_d0_i1?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-3&pf_rd_r=11ZCDDJHYAK9P9P39YKB&pf_rd_t=101&pf_rd_p=470938811&pf_rd_i=507846" rel="nofollow"http://www.amazon.com/gp/product/B001PV6…/a