Lab-Grown Sapphire 4mm Round Faceted Gemstone

Made from lab-grown corundum, this round gemstones displats an intense blue color and is an economical alternative to natural sapphire, the birthstone for September. Each gemstone has a chemical make-up identical to those found in nature. It performs at the bench just as a natural gemstone would. Round-cut gemstones are highly popular and the most commonly available. Rio round gemstones are calibrated for size and hand inspected to ensure maximum attractiveness.

• Gemstone Type: Sapphire
• Stone Shape: Round
• Stone Size: 4mm
• Stone Type: Lab grown
• Color: Blue
• Birthstone: September
• Enhancement: Synthetic (SYN)
• Mohs Hardness: 9
• Refractive Index: 1.762–1.77
• Specific Gravity: 3.95–4.1
• Brand: AGTA
• Weight: 0.000 kg