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Round|Natural|GIA

1.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 6551195115

Certificate GIA 6551195115

Diamond specifications and retailer prices

From $5,646 USD
As of November 4, 2026
Save $6,307 USD (53%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $11,953 USD at NZ Jewellers · As of November 5, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6551195115. Listed at 17 retailers as of November 4, 2026, with prices from $5,646 to $11,953, a $6,307 spread on the same certified stone. NZ Jewellers lists it at $11,953. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551195115
Dimensions7.27 × 7.32 × 4.58 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.27 mm7.32 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551195115
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $11,953 USD|Low: $5,478 USD|High: $11,953 USD|Avg: $7,704 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
November 6, 2026
Retailer 13$5,646 USD
Retailer 12$5,976 USD
Retailer 3$6,474 USD
Retailer 14$6,474 USD
Retailer 15$6,474 USD
Retailer 2$6,741 USD
Retailer 4$7,200 USD
Retailer 5$7,200 USD
Retailer 9$7,345 USD
Retailer 6$7,440 USD
Retailer 16$7,470 USD
Retailer 7$7,877 USD
Retailer 8$8,520 USD
Retailer 11$10,361 USD
Retailer 10$10,500 USD
NZ Jewellers$11,953 USD

40 data points across 16 retailers

17 retailers$5,646 USD to $11,953 USD

B+
Cheapest Retailer
-
$5,646 USD
B+
Retailer 2
-
$5,865 USD
View
B+
Retailer 3
-
$5,976 USD
View
Final sale: no returns
B+
Retailer 4
-
$6,474 USD
View
Retailer 5
-
$6,474 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$6,474 USD
View
B+
Retailer 7
-
$6,594 USD
View
B+
Retailer 8
-
$6,741 USD
View
B
Retailer 9
-
$7,200 USD
View
B
Retailer 10
-
$7,200 USD
View
B+
Retailer 11
-
$7,345 USD
View
B
Retailer 12
-
$7,440 USD
View
B
Retailer 13
-
$7,470 USD
View
Retailer 14
-
$7,877 USD
View
Price last confirmed 14 days ago
B
Retailer 15
-
$10,361 USD
View
B
Retailer 16
-
$10,500 USD
View
Most Expensive
B
NZ Jewellers
112a2b8c-ffcb-4595-b717-688310880cd5 · Nov 5
$11,953 USD
View
16 more retailers have this diamond
Prices start from $5,646 USDSave up to $6,307 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.

B+
1.51ct Round
$5,646 USD