1.80 ct. t.w. Black Spinel and .90 ct. t.w. Emerald Snake Bypass Ring in Sterling Silver. Size 7

STERLING SILVER: Also known as "Standard Silver," sterling silver is silver alloyed with other metals to increase the hardness and durability. Generally, sterling is 92.5% silver and 7.5% other metals. Some sterling silver jewelry is plated with 14kt-18kt gold and referred to as "vermeil," or "gold over sterling."

SPINEL: This rare and durable gemstone, found in a beguiling shade of inky black, catches the eye when set in rings, bracelets, necklaces and earrings. Spinel is also found in captivating tones of pink, purple and green. The red variety is beautiful in its own right and in ages past it was mistaken for a ruby.

EMERALD: the birthstone of May, and from the beryl mineral family, the emerald has been a prized possession of royalty since ancient times and a good quality emerald can be as or even more expensive than a fine diamond of the same carat. Emeralds are considered the traditional gift for the 55th wedding anniversary.