1.35 TCW Marquise-Cut Cubic Zirconia 18k Yellow Gold over Sterling Silver "Mom" Pendant and Chain FREE SHIPPING on orders of $30.00 or more - Top Rated Seller - Trusted Since 1952 - 90 Day Guarantee - Easy Returns - Free PalmBeach Jewelry Gift Box 18k Yellow Gold Over Sterling Silver - Quality Stamp (.925) Cubic Zirconia is the premier diamond simulant; CZ is both affordable and brilliantly flawless. Pendant Style: Heart She's special and so is this lovely heart-shaped "MOM" pendant sparkling with 1.35 carats T.W. of cubic zirconia. A beautiful gift for every mom complete with 18" chain. 18k gold (40 mils) over sterling silver.