What Is the Cheapest Diamond Shape?

When shoppers start comparing diamonds, one of the first questions they ask is: what is the cheapest diamond shape? The answer is simple in most cases. Round diamonds are usually the most expensive shape, while shapes like oval, pear, emerald, cushion, princess, and radiant often cost less per carat. Among all options, cushion and emerald cuts are commonly considered some of the best value choices, especially in the lab diamond market.

The reason comes down to how diamonds are cut from the rough stone. Some shapes waste more material during cutting, which increases cost. Others preserve more of the rough diamond, making them more affordable without necessarily looking smaller or less impressive.

For buyers comparing certified stones, understanding shape pricing can help you maximize size, sparkle, and overall appearance while staying within budget.

(Related: What Is a Fair Price for a Three Carat Lab Diamond?)

Why Diamond Shape Affects Price

Diamond shape plays a major role in pricing because each cut uses the original rough crystal differently. Some shapes are efficient, while others create more waste during the cutting process.

Round diamonds are the clearest example. They require more rough material to produce their perfectly symmetrical shape. This means cutters lose more of the original crystal, which increases production costs and final retail pricing.

Fancy shapes, which include every non round shape, generally retain more of the original rough diamond. Because of this, they usually cost less per carat.

In lab grown diamonds, the pricing gap still exists, even though production methods differ from mined diamonds. Shape demand and cutting efficiency continue to influence prices heavily.

(Related: What is a Fair Price for a Two Carat Lab Diamond?)

The Cheapest Diamond Shapes Ranked

Here are the diamond shapes that typically offer the best value for buyers looking to maximize budget and appearance.

Cushion Cut Diamonds

Cushion cuts are often among the cheapest diamond shapes available. Their rounded square appearance allows cutters to preserve more rough material, keeping prices lower.

They also hide inclusions well and maintain a soft, elegant appearance. Many buyers choose cushion cuts because they offer a large visual look for the price.

Benefits of cushion cuts include:

• Lower price per carat
• Romantic appearance
• Strong brilliance in modern cuts
• Good value in larger carat sizes

For buyers exploring value focused options, cushion cuts are often one of the smartest choices in the loose lab diamonds category.

Emerald Cut Diamonds

Emerald cuts are another affordable option compared to round diamonds. Their long rectangular shape uses rough material efficiently, reducing overall cost.

These diamonds have a completely different appearance from brilliant cuts. Instead of intense sparkle, they create a clean hall of mirrors effect with long flashes of light.

Emerald cuts are ideal for buyers who prefer:

• Elegant, understated style
• Larger visible surface area
• Lower cost per carat
• Sophisticated appearance

Because emerald cuts show clarity more easily, it is important to compare certified stones carefully before buying.

Princess Cut Diamonds

Princess cuts remain popular because they balance brilliance and affordability. Their square shape wastes less rough material than round diamonds while still delivering strong sparkle.

Many buyers choose princess cuts when they want:

• A modern shape
• Excellent sparkle
• Better value than round diamonds
• Sharp geometric appearance

Princess cuts often appear larger than round diamonds of the same carat weight, which adds to their value appeal.

Oval Diamonds

Oval diamonds are not always the absolute cheapest shape, but they offer exceptional visual value.

Their elongated shape creates the illusion of a larger diamond, helping buyers achieve a bigger appearance without paying for higher carat weight.

Oval lab diamonds are popular because they combine:

• Strong brilliance
• Elegant finger coverage
• Lower pricing than round diamonds
• Modern, luxury appearance

For many buyers, oval diamonds represent one of the best combinations of beauty and price efficiency.

Pear and Marquise Shapes

Pear and marquise diamonds can also offer strong value, especially in larger sizes.

Their elongated shapes maximize visible surface area, making them appear bigger than many other cuts at the same weight.

These shapes work particularly well for buyers prioritizing size appearance over traditional round styling.

(Related: What is a Fair Price for a One Carat Lab Diamond?)

Why Round Diamonds Cost More

Round brilliant diamonds are the most expensive shape because they are the most in demand and the least efficient to cut.

Cutters lose more rough material when creating a perfectly round stone. In addition, round diamonds require extremely precise symmetry and cutting standards.

Even in lab grown diamonds, round cuts maintain premium pricing because of:

• Higher cutting waste
• Greater consumer demand
• More complex cutting requirements
• Strong resale and market popularity

This explains why buyers searching for the cheapest diamond shape rarely end up choosing round diamonds if budget is a primary concern.

(Related: What is Price per Carat for Lab Diamonds?)

Which Diamond Shape Looks Biggest for the Money?

Price alone is not the only factor buyers consider. Many people also want the diamond to appear as large as possible.

Some shapes naturally look larger because they spread their carat weight across a bigger surface area.

The shapes that often look biggest for the price include:

Oval and marquise cuts are especially popular among buyers who want maximum finger coverage without increasing budget significantly.

(Related: What Affects the Price of a Lab Grown Diamond?)

Are Lab Diamonds Cheaper in Every Shape?

Yes, lab grown diamonds are generally far less expensive than mined diamonds across all shapes. However, shape pricing differences still exist within the lab diamond market itself.

For example:

• Round lab diamonds still cost more than other shapes
• Cushion and princess cuts remain more affordable
• Fancy shapes often deliver better value per carat

This makes shape selection one of the easiest ways to improve overall value when shopping for certified lab diamonds.

Buyers comparing options can benefit from reviewing a detailed lab diamond price guide before choosing a final shape.

(Related: Why Do Some Jewellers Charge More for the Same Lab Diamond?)

How to Choose the Best Value Diamond Shape

The cheapest option is not always the best option. The ideal choice depends on what matters most to you.

Choose Cushion or Emerald If You Want Lowest Cost

These shapes often provide the strongest price savings compared to round diamonds.

They are ideal for buyers prioritizing:

• Budget efficiency
• Larger carat sizes
• Elegant appearance
• Better price per carat

Choose Oval or Pear If You Want a Bigger Look

Elongated shapes create more visual size, making them ideal for maximizing appearance.

These cuts work especially well in engagement rings because they provide strong finger coverage.

Choose Princess If You Want Sparkle and Savings

Princess cuts balance brilliance with lower pricing, making them one of the safest value focused choices.

They offer a more modern appearance while staying budget friendly.

(Related: Why Do Lab Diamond Prices Vary So Much?)

Important Factors Beyond Shape

While shape affects pricing significantly, other factors still matter.

When comparing loose lab diamonds, buyers should also evaluate:

• Cut quality
• Clarity
• Color grade
• Certification
• Carat weight

A poorly cut cheap diamond may look dull even if the shape itself offers good value.

For this reason, comparing certified diamonds carefully is more important than focusing only on shape pricing.

(Related: Why Are Lab Diamonds Cheaper Than Natural Diamonds?)

Is the Cheapest Diamond Shape the Right Choice?

Not always. The best diamond is the one that balances appearance, sparkle, size, and budget according to your preferences.

Some buyers prefer the unmatched brilliance of round diamonds despite the higher cost. Others prioritize larger appearance and choose oval or marquise cuts. Many buyers find cushion and emerald cuts deliver the ideal mix of beauty and affordability.

The good news is that lab grown diamonds make it easier than ever to choose larger, higher quality stones at more accessible prices across every shape category.

By understanding how shape affects cost, buyers can make smarter comparisons and focus their budget where it matters most.

A carefully selected fancy shape diamond can often provide significantly better overall value than a similarly priced round stone.