Lab-Grown Diamond 1.51ct, Round, Blue, SI2 Ring Mandrels Castaldo®—known throughout the jewelry industry

Castaldo®—known throughout the jewelry industry for performance

Includes two standard cool-white (6500K) 15-watt

The head is cast from 420-grade stainless steel and tool hardened to 50 HRC for maximum durability and effectiveness

The crown and jaw assembly delivers a completely adjustable rotational brake that shifts up to 2" (50

heart and trillion stones

Lab-Grown Diamond 1.51ct, Round, Blue, SI2 Ring Mandrels Castaldo®—known throughout the jewelry industryThis round lab grown diamond is a special purchase item. The stone has a chemical make up identical to those found in nature; it performs at the bench just as a natural stone would. Please review the Specifications & Features section for details about this limited stock offering. Stone Shape: Round Color: Stone Size: 7. 33 mm Stone Type: Lab grown Enhancement: Synthetic (SYN) Mohs Hardness: 10 Refractive Index: 2. 417 Specific Gravity: 3. 52 Country