Materials: 14k Solid gold materials, Ruby, Yellow diamond, Necklace length: 40.5cm (16 Inches) ****If you need a different length of chain, let me know.***** Wearing your birthstone brings you good luck and protects you. The diamond will increase your inner strength and remove any negative energy. ＊Ruby Provides strength and nobility. Helping protect from the evils of the world. Signifies love and passion while attracting good friends and good luck. - Stone: Ruby : 3mm x 3.5mm. Yellow diamond: 2-2.5mm - Chain length: 40.5cm (16”) - Delicate 14K gold: 0.9mm curb chain / Thin barely-there chain. - Material: All 14k solid gold purchased in the USA. - Please note gemstones are slightly different in color shape, and size since all are natural. Some have naturally occurring inclusions or imperfections.