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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2566495423

Certificate GIA 2566495423

Diamond specifications and retailer prices

From $4,595 USD
HK$35,900 HKD
As of November 1, 2026
Save $5,657 USD (55%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $10,252 USD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566495423. Listed at 18 retailers as of October 30, 2026, with prices from $4,595 to $10,252, a $5,657 spread on the same certified stone. NZ Jewellers lists it at $10,252. 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
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2566495423
Dimensions7.33 × 7.37 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Pinpoint, Indented Natural
Top View
7.33 mm7.37 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566495423
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.8%

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: $10,252 USD|Low: $4,557 USD|High: $10,252 USD|Avg: $6,419 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 17$4,595 USD
Retailer 13$4,874 USD
Retailer 9$5,242 USD
Retailer 8$5,374 USD
Retailer 14$5,375 USD
Retailer 11$5,841 USD
Retailer 5$6,129 USD
Retailer 6$6,129 USD
Retailer 10$6,129 USD
Retailer 3$6,225 USD
Retailer 7$6,286 USD
Retailer 2$6,304 USD
Retailer 18$6,412 USD
Retailer 12$6,669 USD
Retailer 4$7,072 USD
Retailer 16$7,531 USD
Retailer 15$9,030 USD
NZ Jewellers$10,252 USD

11 data points across 18 retailers

18 retailers$4,595 USD to $10,252 USD

A
Cheapest Retailer
-
$4,595 USD
HK$35,900 HKD
A
Retailer 2
-
$4,874 USD
₹464,171 INR
View
A
Retailer 3
-
$5,242 USD
SGD 7,084 SGD
View
A
Retailer 4
-
$5,374 USD
View
A
Retailer 5
-
$5,375 USD
View
B+
Retailer 6
-
$5,841 USD
£4,599 GBP
View
B+
Retailer 7
-
$6,129 USD
View
B+
Retailer 8
-
$6,129 USD
View
B+
Retailer 9
-
$6,129 USD
View
B+
Retailer 10
-
$6,225 USD
View
B+
Retailer 11
-
$6,286 USD
View
B+
Retailer 12
-
$6,304 USD
£4,964 GBP
View
B+
Retailer 13
-
$6,412 USD
View
B+
Retailer 14
-
$6,669 USD
€6,351 EUR
View
B+
Retailer 15
-
$7,072 USD
View
B
Retailer 16
-
$7,531 USD
ZAR 121,661 ZAR
View
B
Retailer 17
-
$9,030 USD
£7,110 GBP
View
Most Expensive
B
NZ Jewellers
ff341407-2ec3-4de4-9297-4dde2b7d59ee · Oct 30
$10,252 USD
View
17 more retailers have this diamond
Prices start from $4,595 USDSave up to $5,657 USD

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
$4,595 USD