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1.25 Carat Radiantvs1.5 Carat Marquise

DIAMOND SIZE & SHAPE COMPARISON TOOL

~ 6.7 mm

1.25 carat Radiant diamond

1.25

RADIANT

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17.9 mm

US Dime (17.9mm)

~ 12.0 mm

1.5 carat Marquise diamond

1.5

MARQUISE

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Find the Perfect 1.25 Carat Radiant Diamond

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Find the Perfect 1.5 Carat Marquise Diamond

Radiant vs Marquise Comparison Analysis

When comparing a 1.25 carat Radiant to a 1.5 carat Marquise, the 1.5 carat Marquise appears visually larger. It has a face-up surface area that is approximately 56% larger than the 1.25 carat Radiant. The dramatic elongated marquise measures 12mm in length, creating a more elongated appearance compared to the brilliant radiant cut at 6.7mm.

Detailed Measurements:

The 1.25 carat radiant diamond measures 6.7mm × 5.4mm, while the 1.5 carat marquise measures 12mm × 6mm. The 1.5 carat marquise covers approximately 71% of the width of an average finger (size 6.5), creating a substantial, eye-catching presence.

Shopping Considerations:

Beyond size, consider that radiant diamonds tend to have different brilliance patterns compared to marquise cuts. Use the interactive visual tool above to see these diamonds side-by-side with a US dime for real-world scale reference. The measurements shown are based on well-cut diamonds with standard proportions.

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Diamond FAQ

The 4Cs are how all diamonds get graded: Cut, Color, Clarity, and Carat. Cut is how well it's shaped (this affects sparkle the most). Color goes from D (totally colorless) to Z (yellowish tint), though anything D through J looks white in a ring. Clarity is about tiny flaws inside—most are invisible without a jeweler's loupe, so VS1 or VS2 is plenty. Carat is just weight. Here's the trick: get an Excellent cut first, then aim for G-H color and VS2 clarity, and spend whatever's left on the biggest carat you can afford. Start your diamond search to compare options.