Certification Explained

How to read GIA, IGI and NGTC certificates line by line and spot fake papers.

72 articles total

How to Spot a Fake Diamond Certificate
Certification Explained

How to Spot a Fake Diamond Certificate

A fake certificate is one of the oldest tricks in the diamond trade. A forged report, an altered grade, a non-existent l...
Editorial Team Sep 29, 2026 13 min read
NGTC Certificate: China's Diamond Lab Explained
Certification Explained

NGTC Certificate: China's Diamond Lab Explained

NGTC, the National Gemstone Testing Center, is China's leading national gemological laboratory. For buyers sourcing from...
Editorial Team Sep 29, 2026 13 min read
IGI Certification: What Buyers Should Know
Certification Explained

IGI Certification: What Buyers Should Know

IGI, the International Gemological Institute, is the second most recognized diamond grader and the dominant certifier of...
Editorial Team Sep 29, 2026 13 min read
GIA Diamond Report: Every Section Explained
Certification Explained

GIA Diamond Report: Every Section Explained

The GIA diamond grading report is the most respected document in the diamond trade, but most buyers read only the four C...
Editorial Team Sep 29, 2026 14 min read
How to Read a Diamond Certificate: A Complete Step-by-Step Guide
Certification Explained

How to Read a Diamond Certificate: A Complete Step-by-Step Guide

Complete step-by-step guide to reading a diamond certificate: understanding every section, grading scales, proportions d...
Editorial Team Sep 29, 2026 7 min read
Jewelry Appraisal vs Certification: Understanding the Difference
Certification Explained

Jewelry Appraisal vs Certification: Understanding the Difference

Complete guide to jewelry appraisal vs certification: what each document provides, when you need which, cost differences...
Editorial Team Sep 29, 2026 6 min read
Gemstone Treatments: What Certifications Reveal About Heating, Dyeing, and More
Certification Explained

Gemstone Treatments: What Certifications Reveal About Heating, Dyeing, and More

Complete guide to gemstone treatments: common treatments (heating, dyeing, diffusion, fracture filling), how certificati...
Editorial Team Sep 29, 2026 7 min read
Moissanite Certification and Grading: What Buyers Need to Know
Certification Explained

Moissanite Certification and Grading: What Buyers Need to Know

Complete guide to moissanite certification: how moissanite is graded, available certificates, moissanite vs diamond grad...
Editorial Team Sep 29, 2026 6 min read
Diamond 4Cs Explained: Color, Clarity, Cut, and Carat Weight Guide
Certification Explained

Diamond 4Cs Explained: Color, Clarity, Cut, and Carat Weight Guide

Complete guide to the diamond 4Cs: how color, clarity, cut, and carat weight affect diamond quality and price. Includes ...
Editorial Team Sep 29, 2026 6 min read
AGS Certification: American Gem Society Laboratories Explained
Certification Explained

AGS Certification: American Gem Society Laboratories Explained

Complete guide to AGS diamond certification: how AGS grading works, the AGS 0-10 cut scale, AGS vs GIA, and why AGS is r...
Editorial Team Sep 29, 2026 5 min read

Wholesale Order Terms

As a factory-direct jewelry manufacturer, we quote every order against stone type, metal, setting and finish. Loose stones are priced per carat, finished rings, earrings and bracelets per piece, and custom metal work per gram. Send your stone, metal, size and quantity for a wholesale price list in USD, quoted with FOB, EXW or DDP shipping terms.

MOQ & Pricing

Minimum order quantity (MOQ) starts from 5 pcs per style. Mixed-SKU orders are accepted, and volume discounts apply from 50 pcs; pricing is tiered by quantity and quoted per piece, per carat or per gram.

Lead Time

Ready-stock pieces ship in 2-5 business days. Custom sampling takes 5-10 days; bulk production lead time runs 10-25 days, depending on design, stone size and order quantity, confirmed in your written quote.

Payment Terms

We accept T/T telegraphic bank transfer, PayPal, Alibaba Trade Assurance and Western Union. OEM and private-label orders require a 30% deposit, with the 70% balance paid before shipment.

Shipping

DHL, FedEx and UPS for samples and small orders; air or sea freight for bulk. Worldwide delivery under FOB, EXW or DDP terms, with QC photos shared before dispatch.

Frequently Asked Questions (FAQ)

What is your MOQ for wholesale jewelry orders?

MOQ starts from 5 pcs per style. Mixed-SKU orders are welcome, and catalog styles can be combined into one batch. Larger OEM/ODM and private-label programs negotiate a tiered MOQ and volume discount.

How do you price wholesale moissanite and diamond jewelry?

Loose stones are quoted per carat, finished rings, earrings and bracelets per piece, and custom metal work per gram. Send the stone, metal, size and quantity, and our sales team returns a wholesale price list with USD FOB, EXW or DDP quotes and a written price range.

What is the typical lead time for samples and bulk orders?

Ready-stock pieces prepare in 2-5 business days. Samples take 5-10 days; bulk production lead time runs 10-25 days depending on design, stone size and quantity. The exact timeline is confirmed in your quote before sampling.

Which payment methods and terms do you accept?

We accept T/T telegraphic bank transfer, PayPal, Alibaba Trade Assurance and Western Union. Custom and OEM orders require a 30% deposit, and the 70% balance is paid before shipment; final terms are agreed in the order agreement.

Can you produce custom OEM/ODM and private-label jewelry?

Yes. Send your CAD file, photo, sketch or target price. We handle stone selection, casting, setting, plating, laser engraving, hang tags, jewelry boxes and certificate cards under your own brand name.