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Round|Natural|GIA

1.51ct G SI1 Round Natural Diamond

ID • G/SI1 • GIA 294

Certificate GIA 294

Diamond specifications and retailer prices

From $7,379 SGD
As of November 4, 2026
Save $13,859 SGD (65%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $21,239 SGD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 5 retailers as of November 4, 2026, with prices from $7,379 to $21,239, a $13,859 spread on the same certified stone. Blue Nile lists it at $21,239. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 294
Dimensions7.31 × 7.35 × 4.58 mm
L/W Ratio1.01
Top View
7.31 mm7.35 mm1.51 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 294
Side View
Table 58.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $8,843 SGD|Low: $7,379 SGD|High: $17,025 SGD|Avg: $11,422 SGD|-16.6%
Blue Nile
Retailer 2
Retailer 3
November 4, 2026
Retailer 2$7,379 SGD
Blue Nile$8,843 SGD
Retailer 3$17,025 SGD

12 data points across 3 retailers

5 retailers$7,379 SGD to $21,239 SGD

A
Cheapest Retailer
-
$7,379 SGD
A
Retailer 2
-
$8,843 SGD
View
B
Retailer 3
-
$17,025 SGD
View
B
Retailer 4
-
$18,326 SGD
View
Most Expensive
B
Blue Nile
121719 · Nov 5
$21,239 SGD
$16,572 USD
View
4 more retailers have this diamond
Prices start from $7,379 SGDSave up to $13,859 SGD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.51ct Round
$7,379 SGD