This number 13 talisman necklace is composed of heavily plated 18K gold over silver.  

The perfect token for good fortune. In some countries, such as Italy, 13 is considered a lucky number. The expression fare tredici ("to do 13") means hit the jackpot.

.75" diameter (excluding the loop and bail)

weight 3.35 grams 

Floats from a 19.50" 18K gold plated silver chain