These are 18kt white gold stud earrings featuring cushion cut tanzanite and round brilliant diamonds. The rhodium-plated white gold setting holds two cushion cut tanzanite gemstones measuring approximately 7 mm each, accented by 112 round brilliant cut diamonds totaling 0.35 carats in weight. The diamonds are graded VS2 (Very Slightly Included) for clarity and I color (Near Colorless), ensuring exceptional sparkle and transparency. The earrings are secured with a push post backing.

Tanzanite is the December birthstone, prized for its distinctive blue-violet hue found exclusively in a small region of Tanzania. Total stone count is 114 (2 tanzanite and 112 diamonds). All diamonds used by Costco are natural and untreated; the tanzanite gemstones have been enhanced, as is standard practice in the colored gemstone industry.

Shipping is via UPS insured air delivery with signature required upon receipt, estimated 2–3 business days. Returns are accepted at any Costco warehouse worldwide under Costco's 100% satisfaction guarantee.