Explore our curated selection of IGI-certified 3 Carat Lab Grown Diamonds—real diamonds, responsibly grown, and precision-graded for lasting value.
About 3 Carat Lab Grown Diamonds
3 Carat Lab Grown Diamonds – Exceptional Presence and Modern Brilliance
A 3 carat lab grown diamond offers remarkable size, refined elegance and outstanding brilliance, making it a preferred choice for UK customers seeking high-impact luxury. With a commanding visual presence and excellent light performance, a 3 carat diamond is ideal for statement engagement rings, fine jewellery settings and investment-grade pieces.
Produced using advanced CVD and HPHT technology, lab grown diamonds share the exact chemical structure, hardness and brilliance of mined diamonds — the only difference is their ethical, above-ground origin. At Variation, every 3 carat diamond is IGI-certified and carefully selected for cut precision, clarity and symmetry to ensure exceptional beauty and long-lasting value.
What Is a 3 Carat Lab Grown Diamond?
A 3 carat diamond weighs 0.6 grams and delivers substantial size and radiance, making it an extraordinary centre stone for premium jewellery. Lab grown diamonds follow the same crystallisation process as natural diamonds, ensuring identical brilliance, fire and durability — with a sustainable and ethical approach.
Key Characteristics
100% real diamonds with identical physical and chemical composition to mined stones
High brilliance, fire and impressive visual scale
Ideal for luxury engagement rings and statement jewellery
IGI-certified for grading accuracy and authenticity
Ethical, sustainable and fully traceable origin
For UK customers seeking standout brilliance with responsible sourcing, 3 carat lab grown diamonds offer an exceptional combination of beauty and value.
Why Choose 3 Carat Lab Grown Diamonds from Variation?
Variation is trusted across the United Kingdom for its commitment to precision, ethical quality and transparent value. Every 3 carat diamond is selected with strict criteria, focusing on cut quality — the most influential factor in achieving maximum brilliance.
Why UK Customers Prefer Variation
Premium IGI-certified diamonds
Top colour grades (D–F)
High clarity standards (VVS1–VS2)
Conflict-free and ethical sourcing
Direct-from-manufacturer value
These qualities ensure that every 3 carat Variation diamond delivers exceptional brilliance, structure and purity.
Popular Shapes in 3 Carat Lab Grown Diamonds
Variation offers a wide range of shapes, each engineered for superior brilliance, symmetry and refined aesthetics at the 3 carat size.
Best-Selling Shapes
Round Cut – Maximum brilliance and balanced proportions
Oval Cut – Elongated elegance with radiant sparkle
Princess Cut – Sharp geometry and contemporary brilliance
Emerald Cut – Step-cut clarity with sophisticated appeal
Cushion Cut – Romantic shape with soft, glowing fire
Pear Cut – Graceful silhouette and brilliant sparkle
Radiant Cut – Bold fire and crisp edges
Marquise Cut – Dramatic lengthening effect
Heart Cut – Symbolic brilliance with expressive beauty
Hexagon & Trillion Cuts – Distinctive and modern alternatives
Each shape is proportioned to maximise fire, symmetry and light performance at this premium carat weight.
IGI Certification – Trusted Assurance for UK Buyers
Every 3 carat lab grown diamond from Variation includes a full IGI certificate, ensuring clarity in grading, proportions and authenticity.
Your IGI Certificate Verifies
Cut grade and symmetry
Colour grade (D–F)
Clarity grade (VVS1–VS2)
Carat weight and measurements
Laser inscription for identification
With IGI documentation, UK buyers enjoy complete confidence when purchasing a high-value stone online.
Ethical Creation and Responsible Value
Variation diamonds are grown using sustainable processes that significantly reduce environmental impact while ensuring precise crystal growth and exceptional beauty.
Our Ethical Commitments
Zero mining and reduced ecological impact
Fully traceable production
Lower carbon footprint than mined diamonds
Inventory-free, responsible sourcing
Transparent pricing and provenance
These principles offer UK buyers a responsible alternative to traditionally sourced diamonds, without compromising quality.
Ideal for Engagement Rings, Luxury Jewellery and Bespoke Designs
A 3 carat diamond delivers exceptional scale and presence, making it ideal for:
Engagement rings
Statement solitaire pendants
High-end stud earrings
Luxury necklaces and bracelets
Bespoke fine jewellery
Its substantial size allows for dramatic brilliance and bold visual impact in any setting.
UK-Wide Delivery and Transparent Value
Variation offers secure, insured and trackable delivery throughout the United Kingdom, ensuring a safe and trusted shopping experience.
You receive:
IGI-certified 3 carat lab grown diamond
Direct-from-manufacturer pricing
Transparent and consistent value
Secure UK-wide delivery
Authenticity documentation
Our value-first approach ensures fair pricing aligned with UK customer expectations for premium diamonds.
Modern Brilliance with Responsible Luxury
3 carat lab grown diamonds from Variation deliver extraordinary presence, clarity and brilliance. They are an exceptional choice for UK customers seeking refined luxury, certified quality and sustainable value.
Explore Variation’s 3 carat lab grown diamonds today and discover brilliance shaped by innovation, craftsmanship and ethical creation.
Frequently Asked Questions
Is a 3 carat lab grown diamond considered a luxury size? +
How large does a 3 carat diamond look compared to a 2 carat or 1 carat diamond? +
Are 3 carat lab grown diamonds more affordable than mined diamonds of the same size? +
Do 3 carat lab grown diamonds sparkle as much as natural diamonds of the same size? +
Which clarity and color grades are recommended for a 3 carat diamond? +
Do 3 carat lab grown diamonds come with IGI or GIA certification? +
Are 3 carat diamonds practical for everyday wear in engagement rings? +
Which shapes look biggest in the 3 carat range? +
Is a 3 carat lab grown diamond good for pendants or earrings? +
Are there many options available in the 3 carat lab grown diamond category? +
3 Carat Lab Grown Diamonds by Shape
Explore 3 Carat Lab Grown Diamond shapes and compare cut style, face-up presence, and brilliance to find the outline that best suits your preference.