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  • https://www.revediamonds.com/1-carat-si1-clarity-lab-grown-diamonds

1 Carat SI1 Clarity Lab Grown Diamonds

Choose the perfect 1ct SI1 Clarity lab grown diamond from our expertly curated selection of certified stones.
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London

Looking to buy a 1 Carat SI1 Clarity Lab Grown Diamond? Browse our full range below or book a private visit to our London showroom.

Lab Grown Diamonds
Coloured Diamonds

  • Round Round

  • Princess Princess

  • Cushion Cushion

  • Emerald Emerald

  • Pear Pear

  • Oval Oval

  • Marquise Marquise

  • Radiant Radiant

  • Asscher Asscher

  • Heart Heart

  • European Cut European Cut

  • Old Miner Old Miner

  • Rose Rose

  • Briolette Briolette

  • Bullets Bullets

  • Calf Calf

  • Flanders Flanders

  • Half Moon Half Moon

  • Hexagonal Hexagonal

  • Kite Kite

  • Lozenge Lozenge

  • Octagonal Octagonal

  • Pentagonal Pentagonal

  • Shield Shield

  • Square Square

  • Star Star

  • Tapered Baguette Tapered Baguette

  • Baguette Baguette

  • Tapered Bullet Tapered Bullet

  • Trapezoid Trapezoid

  • Triangular Triangular

  • Trilliant Trilliant

  • Other

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1 Carat SI1 Clarity Lab-Grown Diamond

A 1 carat SI1 clarity lab-grown diamond offers fantastic brilliance with natural inclusions that remain difficult to detect without magnification. It is one of the most popular clarity grades, balancing exceptional beauty with impressive value—perfect for engagement rings and everyday fine jewellery.

Why Choose a Lab-Grown Diamond?

Lab-grown diamonds are real diamonds created using cutting-edge technology that replicates the natural diamond-forming environment. They share the exact same sparkle, durability, and chemical composition as mined diamonds—only their origin differs.

Costing up to 50% less than natural diamonds, they allow you to choose a larger carat size or finer grade while staying within budget.

All of our lab-created diamonds are independently certified by respected organisations including IGI or GIA, giving you complete confidence in quality.

Need Help?

Call us on 020 3585 2295 or chat with our diamond specialists to find your ideal 1 carat SI1 lab-grown diamond today.

Frequently Asked Questions

-What does SI1 clarity mean in a 1 carat lab grown diamond?

SI1 (Slightly Included) clarity includes minor inclusions visible under 10x magnification but typically not noticeable to the naked eye—offering excellent value for brilliance and beauty.

-How much does a 1 carat SI1 clarity lab grown diamond cost?

Pricing usually ranges from £600 to £2,500, depending on cut precision, colour grade, and certification. SI1 clarity diamonds allow for a more affordable option without compromising sparkle.

-Are lab-grown diamonds as durable as mined diamonds?

Yes — lab-grown diamonds have the same hardness and durability as mined diamonds, making them perfect for engagement rings and jewellery designed for everyday wear.

-Can you see inclusions in a SI1 clarity diamond?

Most SI1 diamonds appear eye-clean. Visibility depends on the type and position of inclusions, which is why expert guidance can help you select the best stone.

-What size is a 1 carat SI1 lab-grown diamond?

A 1 carat round diamond typically measures around 6.4 mm in diameter. Dimensions vary slightly depending on cut proportions, not clarity.