Real lab-grown diamonds, cut & graded · Made to order in 7–10 business days
VANTYRE

Journal

Guides & buying advice.

Articles

Two rough lab grown diamond crystals showing the different growth forms produced by HPHT and CVD.

HPHT vs CVD Lab Grown Diamonds: What Is the Difference?

HPHT and CVD are the two methods used to grow diamonds. How each process works, what it means for colour, clarity and…

A round brilliant lab grown diamond held in jeweller's tweezers against a white background.

What Are Lab Grown Diamonds? How They Are Made and Why They Are Real Diamonds

A lab grown diamond is a real diamond with the same carbon structure, hardness and optical properties as a mined stone. How…

A steel ring mandrel, sizing gauge and a solitaire diamond ring on a jewellery tray.

Ring Size Chart: US, UK, EU and MM Conversion Guide

Convert ring sizes between US, UK, EU, and millimeter systems with our complete ring size chart and conversion guide.

A set of steel ring sizers beside a solitaire diamond ring and a measuring gauge.

Average Ring Size for Men: What Size Is Most Common?

Learn the average ring size for men in the US and around the world, plus practical tips for sizing a ring band…

A ring sizer set, measuring gauge and a pavé diamond ring arranged on a jewellery tray.

Average Ring Size for Women: What Most Buyers Should Know

Wondering what the average women ring size is? Learn how average size helps, where it fails, and how to choose a safer…

A ring sizer set, measuring gauge and diamond ring laid out for measuring ring size at home.

How to Measure Ring Size at Home Accurately

Learn how to measure ring size at home with simple, practical methods, common mistakes to avoid, and when to confirm size with…

Three emerald cut diamond solitaire rings in increasing carat sizes on a stone ledge.

Emerald Cut Diamond Size Chart: CT to MM and Spread Guide

Emerald cut diamond size chart with approximate mm measurements and spread guide from 0.50 to 3.00 carats.

Three oval diamond solitaire rings in increasing carat sizes on a stone ledge.

Oval Diamond Carat Size Chart: CT to MM and Ratio Guide

Oval diamond carat size chart with approximate mm measurements and length-to-width ratios from 0.50 to 3.00 carats.

Three solitaire engagement rings with oval and emerald cut diamonds on a stone ledge.

What Is the Average Engagement Ring Carat Size?

Learn the average engagement ring carat size in the US, how lab grown diamonds have changed averages.

Oval, round and emerald cut solitaire engagement rings compared side by side.

Best Diamond Size for an Engagement Ring: A Practical Guide

Find the best diamond size for your engagement ring based on finger size, budget, shape, and lifestyle.