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Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6565157448

Certificate GIA 6565157448

Diamond specifications and retailer prices

From $6,323 SGD
As of November 1, 2026
Save $4,447 SGD (41%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $11,611 SGD at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6565157448. Listed at 10 retailers as of November 1, 2026, with a 70% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6565157448
Dimensions7.31 × 4.55 × 4.55 mm
L/W Ratio1.61
Culet sizeNone
Top View
7.31 mm4.55 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6565157448
Side View
Table 59.0%Crown 33.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $6,541 SGD|Low: $6,323 SGD|High: $12,850 SGD|Avg: $8,207 SGD|-9.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Wholesale Diamonds Direct
November 5, 2026
Retailer 6$6,323 SGD
Retailer 1$6,541 SGD
Retailer 4$6,763 SGD
Retailer 5$6,969 SGD
Retailer 2$7,103 SGD
Retailer 7$7,536 SGD
Retailer 9$7,945 SGD
Retailer 3$8,219 SGD
Retailer 8$10,771 SGD
Wholesale Diamonds Direct$11,611 SGD

36 data points across 10 retailers

10 retailers$6,323 SGD to $10,771 SGD

A
Cheapest Retailer
-
$6,323 SGD
A
Retailer 2
-
$6,541 SGD
View
A
Retailer 3
-
$6,763 SGD
View
A
Retailer 4
-
$6,969 SGD
View
A
Retailer 5
-
$7,103 SGD
View
A
Retailer 6
-
$7,536 SGD
View
B+
Retailer 7
-
$7,945 SGD
View
B+
Retailer 8
-
$8,219 SGD
View
B
Retailer 9
-
$10,771 SGD
View
Most Expensive
Wholesale Diamonds Direct
299902968 · Oct 26
$11,611 SGD
$9,060 USD
View
Price last confirmed 10 days ago
9 more retailers have this diamond
Prices start from $6,323 SGDSave up to $4,447 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
$6,323 SGD