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Compare and purchase the highest-quality diamonds certified by global authorities like GIA and IGI at the lowest prices.

Cornerstone, a fine jewelry marketplace specializing in diamonds, connects primary diamond dealers worldwide with craftsmen with over 30 years of experience.

Compare over 100,000 diamonds at a glance and create your own unique fine jewelry at the best possible price.

■ BEST PRICE GUARANTEE
We guarantee the best price for the same stone and design.
The highest quality at the lowest price.

■ Search over 100,000 diamonds
Filter and compare various diamonds by carat, cut, color, and clarity.
Easily check prices and select your perfect stone.

■ See the real deal with 360° video
Experience the inclusions, brilliance, and shape of your diamonds with 360° HD video.
This provides a vivid experience, just like seeing them before you buy.

■ Provides appraisals from trusted appraisal agencies.
Check out appraisals from trusted appraisal agencies like IGI, GIA, and Wooshin immediately.
We only handle quality-guaranteed diamonds.

■ Customize your jewelry design.
14K / 18K / Platinum, White / Yellow / Rose
Completely customize your jewelry to your desired weight, color, and style.

Information on App Access Permissions

[Required Access Permissions]
■ Not applicable

[Optional Access Permissions]
■ Camera - Access is required to take and attach photos when writing posts.
■ Notifications - Access is required to receive notifications about service changes, events, etc.