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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.

Emerald Cut Diamonds Wholesale NYC
16 min read

Emerald Cut Diamonds Wholesale NYC

An emerald cut is a rectangular step-cut diamond with cropped corners, a large open table, and long parallel facets instead of brilliant-cut wedges — producing broad, mirror-like flashes of light...

Asscher Cut Lab-Grown Diamonds Wholesale
16 min read

Asscher Cut Lab-Grown Diamonds Wholesale

An Asscher cut is a square step-cut diamond with cropped corners and a deep pavilion — essentially a square emerald cut, faceted in concentric layers that produce a distinctive windmill-shaped...

Pear Shape Diamonds Wholesale NYC
16 min read

Pear Shape Diamonds Wholesale NYC

A pear shape diamond is a teardrop-outline brilliant cut — one rounded end like a round brilliant, tapering to a single point like a marquise — faceted for fire rather than the broad flat planes...

Oval Cut Diamonds Wholesale NYC
18 min read

Oval Cut Diamonds Wholesale NYC

An oval cut diamond is an elongated brilliant-cut diamond — essentially a round brilliant stretched along one axis — with no points or corners, full brilliant faceting for round-level fire, and a...

Heart Shape Diamonds Wholesale
17 min read

Heart Shape Diamonds Wholesale

A heart shape diamond is a modified brilliant cut — two symmetrical lobes meeting at a defined cleft at the top, narrowing through the wings to a single point at the bottom — faceted for fire and...

Radiant Cut Diamonds Wholesale NYC
18 min read

Radiant Cut Diamonds Wholesale NYC

A radiant cut diamond is a rectangular or square outline with trimmed corners and a full brilliant facet pattern — combining an emerald cut's clean silhouette with a round brilliant's fire. Guru...

Types of Cushion Cut Diamonds Guide
15 min read

Types of Cushion Cut Diamonds Guide

"Cushion cut" isn't one cut — it's a family of related square-to-rectangular, rounded-corner shapes that differ in facet pattern and outline: cushion brilliant, cushion modified brilliant, antique...

Antique Cushion vs Old Mine Cut
18 min read

Antique Cushion vs Old Mine Cut

"Antique cushion" and "Old Mine Cut" get used interchangeably in retail marketing, but they're not the same claim. Old Mine Cut is a specific historical faceting standard — high crown, large open...