Beautiful, delicate, London Blue Topaz (Nigeria Origin)Shape: Round, Size: 6mm, Carat Size: 1.62 CT. Despite the delicate look the London Blue Topaz rates a nice 8 on the Mohs hardness scale for minerals.These beauties are set in 925 solid, 6-prong, Sterling Silver castings with matching ear nuggets. Unique and timeless these shimmering ocean blue inspired topaz earrings aren't just for November babies! Everyone can appreciate this sparkle. Medium blue to a light arctic in sunlight. Approximately, the length of a dime from stone to the end of the post. Don't let these affordable cuties pass you by!