Police arrested a friend of the store owner's son and named another suspect Monday.
Sources say police are searching for a possible suspect after surveillance photos were released.
The Brass Owl will open in September at 36-19 Ditmars Blvd. selling shoes, jewelry and accessories.
A thief quickly grabbed the pendant from the 18-year-old's neck, according to video released by police.
A group of four teens robbed four people uptown, including two men in their 60s, police said.
The suspect broke into a home on 108th Street between 67th Drive and 67th Road, police said.
Elma Blint is selling her custom-made jewelry at 739 Fulton St. in Fort Greene.
The Philadelphia-based jeweler is opening its first New York City store at 72nd Street.
About $1,400 in cash and jewelry were stolen from a Warren Street home last week, police said.
The woman's $13,400 Rolex, $1,350 bracelet and $610 in cash were swiped as she slept, police said.
Twenty-six pieces of jewelry were stolen from inside the 8 Spruce St. building.
Adornia jewelry, which opened last month, offers cutting-edge pieces made with high-quality materials.
A $2,000 diamond engagement ring was among the valuables stolen Feb. 4, police said.
Roux-Roux, located at 243 Smith St., will host their first art exhibition this month.
The Marketplace at St. Anthony's opens on March 7, with new managers and a host of new vendors.
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