How Much Is a Lab-Grown Diamond? 2026 Prices for 1, 2 and 3 Carats

Shopping for a lab-grown diamond in 2026? Whether you're considering a classic 1-carat solitaire or a statement-making 3-carat engagement ring, understanding diamond prices can help you make a confident purchase.

Lab-grown diamonds are generally more affordable than natural diamonds with comparable specifications. However, the price of a lab-grown diamond depends on more than its carat weight. Cut, colour, clarity, shape and current market conditions all influence what you'll pay.

Here's what to know about lab-grown diamond prices, how much to budget for different carat sizes, and whether these diamonds hold their value over time.

How Much Does a Lab-Grown Diamond Cost in 2026?

The price of a lab-grown diamond varies depending on its specifications and the retailer. Two diamonds of the same carat weight can have different prices because of differences in cut, colour, clarity and shape.

As a market reference, StoneAlgo's October 12, 2026 price snapshot reported the following average price benchmarks for loose lab-grown diamonds. These are market benchmarks, not Diamond Soirée's in-house prices. 

Actual prices can fall below or rise above these benchmarks depending on the individual diamond's characteristics and the retailer. Use them as a starting point, not a guaranteed quote.

How Much Is a 1-Carat Lab-Grown Diamond?

A 1-carat lab-grown diamond is a popular choice for engagement rings and everyday fine jewellery.

When comparing 1-carat diamonds, consider the cut, colour and clarity grades alongside the price. A well-cut diamond can offer impressive brilliance, while different colour and clarity combinations affect the overall cost.

If you're working within a budget, comparing several certified 1-carat stones can help you find the right balance between appearance and value.

How Much Is a 2-Carat Lab-Grown Diamond?

A 2-carat lab-grown diamond offers a more prominent centre stone, making it a popular choice for buyers seeking greater visual impact.

Shape matters, too. Round brilliant diamonds and fancy shapes, such as oval and emerald cuts, can differ in price even at the same carat weight.

When comparing 2-carat diamonds, look at the individual stone's grading report and consider whether a particular cut, colour or clarity grade is worth the additional cost to you.

How Much Is a 3-Carat Lab-Grown Diamond?

A 3-carat lab-grown diamond creates a striking look, particularly in solitaire engagement rings and other centre-stone designs.

At this size, comparing individual stones becomes especially important. Different proportions, clarity characteristics and shapes can result in substantial price differences.

Review the grading report, cut quality and overall appearance before deciding which diamond offers the best value.

Remember: These benchmarks represent loose diamonds, not finished engagement rings. A ring's total price also depends on its setting, metal, craftsmanship and design.

What Is the Lab-Grown Diamond Price Per Carat?

Price per carat is calculated by dividing a diamond's price by its carat weight.

For example, if a hypothetical 2-carat diamond costs $1,600, its price per carat is $800. This is an illustration of the calculation, not a current Diamond Soirée price.

The price per carat helps compare diamonds, but it doesn't tell the whole story. A 2-carat diamond won't necessarily cost exactly twice as much as a 1-carat diamond with similar specifications.

For a meaningful comparison, look at stones with similar cut, colour, clarity and shape.

What Factors Affect Lab-Grown Diamond Prices?

Four key characteristics influence a diamond's price:

• Carat: Refers to the diamond's weight. Larger stones can cost more overall, although the relationship isn't linear.
• Cut: Influences brilliance, sparkle and light performance.
• Colour: Higher colour grades may command different prices depending on the stone and market.
• Clarity: Measures the visibility and characteristics of inclusions and blemishes.

Diamond shape, certification and changing market conditions can also influence pricing.

Do Lab-Grown Diamonds Hold Value?

Lab-grown diamonds are durable and can last a lifetime with proper care. However, their long-term resale value is a separate consideration.

Lab-grown diamonds generally have limited resale value compared with their original retail price. Prices can also decline as production technology advances and market supply changes.

If you're buying an engagement ring, consider what matters most to you. If your priority is appearance, size and design flexibility within a specific budget, a lab-grown diamond may be an appealing option.

If you're buying primarily as a financial investment, don't assume the diamond will appreciate in value.

Find Your Lab-Grown Diamond at Diamond Soirée

Choosing a diamond is about finding the right balance between size, quality, design and budget.

Explore Diamond Soirée's lab-grown diamond collection to compare available stones by carat weight, colour, clarity and shape. You can also book a consultation to discuss your preferences and request current prices for available diamonds.

Whether you're considering a 1-, 2- or 3-carat stone, comparing individual diamonds will help you make a more informed decision.

Frequently Asked Questions

1. How much does a lab-grown diamond cost in 2026?

The cost of a lab-grown diamond in 2026 depends on its carat weight, cut, colour, clarity, shape and retailer. Market benchmarks can provide a starting point, but actual prices vary between individual diamonds and sellers.

2. How much is a 1-carat lab-grown diamond?

The price of a 1-carat lab-grown diamond varies according to its cut, colour, clarity and shape. Compare certified diamonds with similar specifications to find one that suits your budget and preferences.

3. How much is a 2-carat lab-grown diamond?

A 2-carat lab-grown diamond generally costs more than a comparable 1-carat stone, but the price is not necessarily double. Cut quality, colour, clarity and diamond shape all affect the final cost.

4. How much is a 3-carat lab-grown diamond?

The price of a 3-carat lab-grown diamond depends on its individual characteristics, including cut, colour, clarity and shape. Compare grading reports and current retailer prices before choosing a diamond.

5. What factors affect lab-grown diamond prices?

Lab-grown diamond prices are influenced by carat weight, cut, colour, clarity, shape, certification and market conditions. Comparing diamonds with similar specifications helps you understand the differences in price and value.

6. Do lab-grown diamonds hold their value?

Lab-grown diamonds generally have limited resale value compared with their original retail price. Market supply, production technology and changing consumer demand can affect prices, so they should not be purchased with an expectation of financial returns.