A natural 0.68 carat white sapphire in a 5mm round calibrated cut, colorless, heat treated. Calibrated 5mm round white sapphire is a standard designer and jeweler format — the 5mm diameter fits the most common standard solitaire and bezel settings available in the commercial setting market, making this a drop-in stone for any 5mm round setting without custom fabrication. Colorless white sapphire at Mohs 9 is the most durable colorless gemstone alternative to diamond.

Why Choose this 0.68 ct Calibrated 5mm Round White Sapphire?

Calibrated 5mm round sapphire is the designer's and jeweler's format — it eliminates the sizing and setting accommodation steps that uncalibrated stones require. If you are working with a standard 5mm solitaire, bezel, or prong setting, this stone drops in directly. Colorless and heat treated, the stone is honest about its treatment and delivers consistent colorlessness across the face.

Key Benefits of this Natural White Sapphire

• Calibrated 5mm Standard
  Exact 5mm diameter — fits standard round settings without sizing adjustment or custom fabrication.
• Colorless Diamond Alternative
  Natural colorless corundum at Mohs 9 — the most durable colorless gem other than diamond.
• Designer-Ready Format
  Calibrated round is the most versatile format for jewelry designers and setters working with standard components.
• Mohs 9 Hardness
  Appropriate for daily wear in any setting type without special care requirements.
• Consistent Colorlessness
  Heat treated to maximize colorlessness — the standard that commercial white sapphire is produced to.

Features

• Carat Weight: 0.68 Carats
• Gem Type: Natural White Sapphire
• Cut: Round (calibrated 5mm)
• Dimensions: 5mm diameter
• Treatment: Heat Treated
• Color: Colorless
• Clarity: Eye-clean — no visible inclusions under normal viewing
• Hardness: 9 on the Mohs scale

This 0.68 ct calibrated 5mm round white sapphire has been selected for colorlessness and dimensional consistency — the qualities that make calibrated stones reliable for professional setting work.

Why Customers Love This Gemstone

• Standard 5mm Calibration: Drops into any 5mm round setting without adjustment.
• Colorless Performance: Consistent colorlessness for diamond-substitute applications.
• Designer Ready: Calibrated format eliminates sizing steps in the manufacturing workflow.
• Trusted Source: Treatment disclosed honestly, colorlessness confirmed.

This 0.68 ct calibrated 5mm round white sapphire is the practical specification for jewelry designers and custom setters working with standard 5mm round solitaire and bezel components.

Perfect Uses for this 5mm Round White Sapphire

• Standard 5mm solitaire setting — drop-in fit
• Diamond-alternative engagement ring or pendant
• Earring center stones (pair) in 5mm settings
• Custom jewelry design with standard round components
• September birthstone gift