Oval|Natural|GIA

1.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 1285728814

Certificate GIA 1285728814

Diamond specifications and retailer prices

From $11,185 USD
As of October 28, 2026
Save $8,759 USD (44%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $19,944 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1285728814. Listed at 19 retailers as of October 28, 2026, with prices from $11,185 to $19,944, a $8,759 spread on the same certified stone. MOH London lists it at $19,944. 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
D
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1285728814
Dimensions8.56 × 6.58 × 4.11 mm
L/W Ratio1.30
Culet sizeNone
Top View
8.56 mm6.58 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1285728814
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 62.5%

Caratlytics Score

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

Price History

Last verified: Oct 28
Current: $19,944 USD|Low: $11,185 USD|High: $20,077 USD|Avg: $15,011 USD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 7$11,185 USD
Retailer 3$12,702 USD
Retailer 8$13,549 USD
Retailer 5$13,557 USD
Retailer 6$13,636 USD
Retailer 10$13,761 USD
Retailer 11$14,290 USD
Retailer 4$15,282 USD
Retailer 9$17,995 USD
Retailer 2$18,662 USD
MOH London$19,944 USD

43 data points across 11 retailers

19 retailers$11,185 USD to $19,944 USD

B+
Cheapest Retailer
-
$11,185 USD
B
Retailer 2
-
$11,785 USD
View
B
Retailer 3
-
$11,801 USD
View
B
Retailer 4
-
$11,870 USD
CA$16,486 CAD
View
B
Retailer 5
-
$12,495 USD
View
B
Retailer 6
-
$12,702 USD
View
B
Retailer 7
-
$13,549 USD
View
B
Retailer 8
-
$13,557 USD
£10,675 GBP
View
Retailer 9
-
$13,636 USD
A$20,979 AUD
View
Price last confirmed 8 days ago
B
Retailer 10
-
$13,761 USD
View
B
Retailer 11
-
$14,290 USD
View
B
Retailer 12
-
$14,580 USD
View
B
Retailer 13
-
$14,580 USD
View
B
Retailer 14
-
$14,720 USD
View
B
Retailer 15
-
$15,070 USD
View
B
Retailer 16
-
$15,282 USD
€14,554 EUR
View
B
Retailer 17
-
$17,995 USD
View
B
Retailer 18
-
$18,662 USD
ZAR 301,479 ZAR
View
Most Expensive
B
MOH London
6AEEE2EE4 · Oct 29
$19,944 USD
£15,704 GBP
View
18 more retailers have this diamond
Prices start from $11,185 USDSave up to $8,759 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
$11,185 USD