1 1/3 ct Kanchanaburi Sapphire Stud Earrings By Danny - September 13, 2015 562 Use $30 Off Coupon Code: SALE and get free shipping. Add a pop of deep blue with these dazzling kanchanaburi sapphire pair. Two round-cut kanchanaburi sapphires totaling 1 1/3 ct are crafted in 10K white gold. Pieces measure 3/16 by 3/16 inches.