The Guru Diam Blog

Jun 23, 2026 17 min read

Buying Lab-Grown Melee Wholesale

How calibrated lab-grown melee is sized, matched, and sold in parcels for pave, halos, and eternity work.

Jun 23, 2026 18 min read

Matched Pairs of Lab-Grown Diamonds

What makes a true matched pair and how wholesale matching works for studs, drops, and side stones.

Jun 23, 2026 16 min read

Antique-Cut Lab-Grown Diamonds Wholesale

A trade guide to old mine and old European antique-cut lab-grown diamonds and how to source them.

Jun 23, 2026 19 min read

CVD vs HPHT Lab-Grown Diamonds: The Physics Behind the Certificate

The defect chemistry, spectroscopy, and certificate language behind CVD and HPHT lab-grown diamonds.

Jun 23, 2026 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.

Jun 23, 2026 23 min read

Opening a Wholesale Diamond Account

What jewelers and retailers need to open a wholesale lab-grown diamond trade account.

Apr 08, 2026 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.

Apr 08, 2026 16 min read

10 Best Places to Buy Lab-Grown Diamonds in the USA (2026 Guide)

Where to buy the best lab-grown diamonds in the USA. We ranked 10 top retailers and wholesalers by quality, certification, pricing, and customer experience.

Jun 05, 2026 15 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.