Shop › Custom Sand Dollar Pendant in 18k Yellow Gold and Sterling Silver. London Blue Topaz Gem Image 1 of 1 Custom Sand Dollar Pendant in 18k Yellow Gold and Sterling Silver. London Blue Topaz Gem $425.00 Approx. 35mm tall, chain not included. Handmade by Local Artist. Quantity: Add To Cart Added! Approx. 35mm tall, chain not included. Handmade by Local Artist.