Gold Tone Mini February - Purple Birthday Crystal Gold Tone Heart Charm Necklace. Birthday Crystal Heart is approximately 0.24 x 0.25 x 0.11 inches (HxWxD) not including loop. Back is smooth and rounded. Silver plated necklace is 19 inches plus 2 inch extender chain. Lobster Claw Clasp. Beautiful fashion necklace makes a wonderful gift. PLEASE NOTE: Our products are lead safe, but are not intended for children 14 years and younger.