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Oval|Natural|GIA

1.51ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 2556755740

Certificate GIA 2556755740

Diamond specifications and retailer prices

From $4,495 USD
As of November 1, 2026
Save $4,309 USD (49%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $8,804 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556755740. Listed at 26 retailers as of October 29, 2026, with prices from $4,495 to $8,804, a $4,309 spread on the same certified stone. MOH London lists it at $8,804. 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
J
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556755740
Dimensions8.77 × 6.26 × 3.93 mm
L/W Ratio1.40
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Knot, Crystal, Feather, Indented Natural, Needle
Top View
8.77 mm6.26 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556755740
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: 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 1
Current: $8,804 USD|Low: $4,643 USD|High: $8,875 USD|Avg: $6,033 USD|+0.3%
MOH London
Retailer 2
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Retailer 24
November 2, 2026
Retailer 11$4,643 USD
Retailer 9$4,696 USD
Retailer 24$4,697 USD
Retailer 12$4,755 USD
Retailer 10$4,970 USD
Retailer 6$5,045 USD
Retailer 8$5,325 USD
Retailer 7$5,385 USD
Retailer 18$5,385 USD
Retailer 23$5,453 USD
Retailer 22$5,479 USD
Retailer 17$5,515 USD
Retailer 15$5,642 USD
Retailer 13$5,719 USD
Retailer 2$5,798 USD
Retailer 4$6,020 USD
Retailer 14$6,020 USD
Retailer 16$6,095 USD
Retailer 21$6,213 USD
Retailer 5$6,220 USD
Retailer 20$6,327 USD
Retailer 19$7,303 USD
Retailer 3$8,611 USD
MOH London$8,804 USD

34 data points across 24 retailers

26 retailers$4,495 USD to $8,804 USD

B+
Cheapest Retailer
-
$4,495 USD
B+
Retailer 2
-
$4,643 USD
View
B+
Retailer 3
-
$4,696 USD
View
B+
Retailer 4
-
$4,697 USD
View
B+
Retailer 5
-
$4,755 USD
View
B+
Retailer 6
-
$4,893 USD
A$7,527 AUD
View
B+
Retailer 7
-
$4,908 USD
View
B+
Retailer 8
-
$4,970 USD
View
Final sale: no returns
B+
Retailer 9
-
$5,045 USD
View
B
Retailer 10
-
$5,325 USD
View
B+
Retailer 11
-
$5,385 USD
View
B
Retailer 12
-
$5,385 USD
View
B
Retailer 13
-
$5,479 USD
View
Retailer 14
-
$5,515 USD
A$8,484 AUD
View
Price last confirmed 23 days ago
B
Retailer 15
-
$5,642 USD
View
B+
Retailer 16
-
$5,719 USD
£4,503 GBP
View
B
Retailer 17
-
$5,798 USD
£4,565 GBP
View
B
Retailer 18
-
$6,020 USD
View
B
Retailer 19
-
$6,020 USD
View
B
Retailer 20
-
$6,095 USD
View
B
Retailer 21
-
$6,213 USD
View
B
Retailer 22
-
$6,220 USD
View
B
Retailer 23
-
$6,327 USD
€6,026 EUR
View
B
Retailer 24
-
$7,303 USD
ZAR 117,978 ZAR
View
B
Retailer 25
-
$8,611 USD
View
Most Expensive
B
MOH London
23DAD2790 · Oct 29
$8,804 USD
£6,932 GBP
View
25 more retailers have this diamond
Prices start from $4,495 USDSave up to $4,309 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 Oval
$4,495 USD