It took 10 years for Japanese jeweler Mikimoto to find just the right pearls for this necklace. The 18-inch-long strand is composed of 27 perfectly matched, perfectly round White South Sea pearls (extremely rare AAA quality cultured pearls 15.06 x 17.24 mm in diameter) and bears a “heart-stopping” luster, Mikimoto says.

The South Sea White cultured pearl is distinguished from all other pearls by its magnificent, satiny luster. MIKIMOTO South Sea White cultured pearls have a subdued, opalescent appearance which changes slightly under different light conditions.

This spectacular piece is complemented by a gorgeous art deco oval clasp with 11.92 carats of diamonds. It’s on sale for $1 million and available for a limited time at MIKIMOTO New York.