19 min read
CVD vs HPHT Lab-Grown Diamonds: The Physics Explained
The defect chemistry, spectroscopy, and certificate language behind CVD and HPHT lab-grown diamonds.
Insights & Guides
The Guru Diam Blog
Expert articles on lab-grown diamonds, wholesale sourcing strategies, and the latest trends shaping the jewelry industry.
20 min read
IGI vs GIA Lab-Grown Certification
How IGI and GIA certify lab-grown diamonds and when each report matters for the trade.
23 min read
Opening a Wholesale Diamond Account
What jewelers and retailers need to open a wholesale lab-grown diamond trade account.
16 min read
10 Best Lab-Grown Diamond Wholesalers in NYC (2026 Guide)
Ranked: the 10 best lab-grown diamond wholesalers in NYC's Diamond District. Certified IGI, GIA & GCAL diamonds at genuine wholesale prices.
16 min read
10 Best Lab-Grown Diamond Sellers (2026)
Where to buy lab-grown diamonds in the USA in 2026 — our ranked list of the 10 best sellers by quality, certification, pricing, and service.
21 min read
4-6 Day Custom Ring Turnaround Guide
Fast turnaround custom jewelry manufacturing compresses the CAD-to-finished-ring cycle to 4-6 working days, versus the 9-19 days most trade suppliers quote.
20 min read
Matched Pairs Fancy Shapes Wholesale: Sourcing Trapezoids, Half-Moons, Shields & Kites for Side Stones
If you build three-stone rings, you already know the bottleneck. The center is the easy part — you can pull a single round or oval from any feed. The job dies on the sides.
19 min read
8 Custom Diamond Jewelers in NYC (2026)
8 types of custom lab-grown diamond jewelers in NYC — bridal specialists, antique-cut recreation, private-label workshops, and how to choose one.
19 min read
Matched Pairs for Stud Earrings: The Highest-Turn SKU for Independent Jewelers
Matched diamond pairs for stud earrings wholesale are the fastest-turning SKU most independent jewelers can stock: a calibrated pair, a clean white-gold or platinum four-prong basket, and a sub-$1,500