Our Victorian-style floral white topaz ring set has a single 4mm white topaz in .925 sterling silver. Also available in 14K White Gold, 18K Gold or Platinum by request. Gemstone Characteristics, Gemstone Type: White Topaz, Gemstone Size: 4mm, Gemstone Shape: Round, Gemstone Rating: AAA (Excellent). We guarantee our Vintage White Topaz Floral Ring Bridal Set in .925 Sterling Silver to be high quality, authentic jewelry, as described above.