Design your own engagement ring

Start designing

3D Ring Builder New
Shop Diamonds
Diamond Check Tool
Diamond Comparison Tool
Side by side expert analysis of up to 4 diamonds

Diamond Price Indexes
Track diamond prices for any category

Diamond Price Calculator
Calculate a price estimate for natural or lab grown diamonds

Watch demo Contact sales

Vault

Build your dream ring with top-rated jewelers Build your dream ring with top-rated jewelers

Design your dream ring with AI and search diamonds from top-rated local and online jewelers

Design your dream ring with AI and search diamonds from top-rated local and online jewelers

💍 3D Ring Builder

StoneAlgo's Price Tracking

2M+

Diamond Inventory

1M+

Happy Shoppers

4.9★

Trust Pilot Rating

Trust Pilot

10+

Top-Rated Jewelers

Jewelers

750M+

Historical Diamond Prices

Historical Prices

5M+

Diamond Checks

Diamond Checks

Search diamonds by shape

Round

Cushion

Oval

Princess

Emerald

Pear

Radiant

Asscher

Marquise

Heart

How StoneAlgo helps you buy better

Smart Search

StoneAlgo’s Smart Search will help you find the perfect diamond from over 2M stones.

Find Great Deals

We help you find underpriced, high quality stones. Our fair price estimate saves you time and money.

Compare Diamonds

Compare up to 4 diamonds at once and get expert analysis in a useful side by side view.

Check For Red Flags

Sometimes what looks like a great deal on paper is just too good to be true.

Check Prices

Track diamond prices with our historical price charts & proprietary diamond price indexes.

Our Retailers

Retailer? Join here

Highly Recommend StoneAlgo

I am VERY grateful to StoneAlgo for saving me from a would-be terrible purchase. Highly recommend!

— Alex B

StoneAlgo is a Tremendous Resource

The cut score was a terrific way to hone in on the best candidates when faced with the overwhelming number of options available online.

— Igor G

The Most Beautiful Diamond I’ve Ever Seen!

By using the StoneAlgo calculator, I was able to find the best cut diamond at the best price. My diamond is breathtaking.

— Kim V

Example of a diamond on hand on the day of engagement

Example of a diamond on hand on vacation near water

Example of a diamond on hand on vacation in Europe

Example of a diamond on hand on vacation in cold weather

See how over 1 million diamond shoppers saved money on StoneAlgo

The world's largest diamond marketplace.

Features

Prices

More

Company

© 2025 StoneAlgo, Inc. All rights reserved.