2.75 CTTW Tanzanite Hoop Earrings in Sterling Silver
- Stone type: tanzanite
- Total carat weight: 2.75
- Stone size and shape: 4mm round-cut
- Metal: sterling silver
- Backing type: posts with snap-down clasps
We lay out the basics—from color saturation to lab fabrication—on what you should know before buying gemstone jewelry.