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Insights & Guides

The Guru Diam Blog

Expert articles on lab-grown diamonds, wholesale sourcing strategies, and the latest trends shaping the jewelry industry.

Diamond Tennis Bracelets: A Sourcing Guide
15 min read

Diamond Tennis Bracelets: A Sourcing Guide

How jewelers and manufacturers source loose diamonds and melee for tennis bracelet production — stone count, TCW math, setting styles, and wholesale pricing.

How to Run a Diamond Upgrade Policy
17 min read

How to Run a Diamond Upgrade Policy

A jeweler's guide to designing a diamond upgrade/trade-in policy: credit structures, fair valuation, margin risk, and wholesale restocking.

How Diamond Value Is Calculated
15 min read

How Diamond Value Is Calculated

How diamond value is actually determined — the 4Cs, market factors, and the resale-vs-retail gap — explained for jewelers and their retail customers.

Diamond vs. Ruby: A Trade Comparison
15 min read

Diamond vs. Ruby: A Trade Comparison

Diamond vs ruby compared: hardness, color, certification, treatment disclosure, and pricing — a factual guide for jewelers choosing a center stone.

Diamond Wedding Bands: A Wholesale Guide
15 min read

Diamond Wedding Bands: A Wholesale Guide

How jewelers source and stock diamond wedding bands wholesale — styles, carat/setting tiers, pricing, and supplier evaluation criteria.

What Is Diamond Windowing?
16 min read

What Is Diamond Windowing?

What diamond windowing is, why it happens, why emerald and step cuts show it most, and how wholesale buyers should screen for it.

Diavik Diamond Mine Explained
15 min read

Diavik Diamond Mine Explained

What the Diavik diamond mine is, where it's located, its production history, and what it means for natural diamond sourcing today.

East-West Setting Rings: A Sourcing Guide
15 min read

East-West Setting Rings: A Sourcing Guide

How east-west (horizontal) diamond settings work, which shapes suit them, and what jewelers should know sourcing stones for this orientation.

Ekati Diamond Mine Explained
16 min read

Ekati Diamond Mine Explained

What the Ekati diamond mine is, how it launched Canada's diamond industry in 1998, and how Ekati-origin diamonds reach the wholesale trade today.