Jewelry designer Karen Karch relocated her Nolita boutique to a secluded Gramercy block with a neighborhood feel. Griffin-detailed gates and a dramatic entryway mural, painted by NYC street artist Bunny M (bunnym.com), greet clients. The sleek, minimalist shop boasts oversize windows and ample seating for one-on-one appointments. Sparkly baubles rest behind a few glass cases, since most of the fancy items are custom-designed. Couples tying the knot will find jewels for their engagement ($4,000–$60,000), from classic round-cut diamond rings ($6,800) to unconventional, tiara-shaped styles encrusted with sapphires ($3,200–$7,000). Wedding bands ($900–$8,000) include vinelike rings for women ($900–$6,000) and textured-platinum bands for men ($1,100–$6,000). Karch’s signature detailed jewelry includes jade-and-rose-gold necklaces ($3,400) and turquoise rosebud rings ($2,500), as well as onyx horn necklaces ($2,600) and faceted sterling-silver cufflinks ($500).