Product Description
This Swiss Blue Loose Topaz is 16.5 carats. Its shape is rectangular step cut. The dimension is 16×11×10mm. The color is medium aqua-blue color with strong clarity through its step-cut facets. The origin of topaz is Brazil. The stone is heated.
Stone Details
- Stone Name: Topaz – Swiss Blue
- Total Weight: 16.5 carats
- Carat Range: 1–20 carats (filter range)
- Dimensions: 16 × 11 × 10 mm
- Cut / Shape: Step Cut (Rectangular)
About Swiss Blue Topaz
Swiss Blue Topaz is a specific color grade with blue topaz. This is distinguished by its medium-intensity aqua tone — lighter than London Blue but deeper than Sky Blue.
Frequently Asked Questions
What is the difference between Swiss Blue, Sky Blue, and London Blue topaz?
Sky Blue is the lightest shade, Swiss Blue is a medium vivid aqua, and London Blue is the darkest and most saturated. The difference comes from the intensity of treatment applied during production.
Is heat-treated topaz less valuable than untreated topaz?
Heat treatment is the accepted standard for all blue topaz on the market — natural blue topaz is extremely rare. Treated stones are stable, widely used in fine jewelry, and priced based on size, cut quality, and clarity.
What jewelry settings work best for a large step-cut topaz?
Step-cut stones pair well with bezel and four-prong settings that expose the stone’s table. For a 16×11mm size, a cocktail ring, pendant, or brooch setting is most practical.