This Zodiac pendant is available in 10K Yellow Gold & White Gold, 14K Yellow Gold & White gold and Sterling Silver. This pendant is available with and without a chain.
The chain in the photos show 1.2mm and 1.8mm. The chain on neck is 1.8mm.
Yellow Gold Curb chains available 1.2mm, 1.8mm
White Gold Curb chains available 1.3mm, 1.8mm
Sterling Silver Curb chain available in 1.8mm