CaratHunter
Plans
Oval|Natural|GIA

1.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 1285728814

Certificate GIA 1285728814

Diamond specifications and retailer prices

From $15,923 AUD
$11,185 USD
As of October 28, 2026
Save $12,319 AUD (44%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $28,242 AUD at MOH London · As of November 1, 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 $15,923 to $28,242, a $12,319 spread on the same certified stone. MOH London lists it at $28,242. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $28,242 AUD|Low: $15,923 AUD|High: $28,582 AUD|Avg: $21,738 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 6$15,923 AUD
Retailer 7$19,288 AUD
Retailer 2$19,300 AUD
Retailer 5$19,413 AUD
Retailer 9$19,590 AUD
Retailer 10$20,343 AUD
Retailer 4$21,755 AUD
Retailer 8$25,618 AUD
Retailer 3$26,567 AUD
MOH London$28,242 AUD

43 data points across 10 retailers

19 retailers$15,923 AUD to $28,242 AUD

B+
Cheapest Retailer
-
$15,923 AUD
$11,185 USD
B
Retailer 2
-
$16,777 AUD
$11,785 USD
View
B
Retailer 3
-
$16,800 AUD
$11,801 USD
View
B
Retailer 4
-
$16,898 AUD
CA$16,486 CAD
View
B
Retailer 5
-
$17,788 AUD
$12,495 USD
View
B
Retailer 6
-
$18,083 AUD
$12,702 USD
View
B
Retailer 7
-
$19,288 AUD
$13,549 USD
View
B
Retailer 8
-
$19,300 AUD
£10,675 GBP
View
Retailer 9
-
$19,413 AUD
View
Price last confirmed 9 days ago
B
Retailer 10
-
$19,590 AUD
$13,761 USD
View
B
Retailer 11
-
$20,343 AUD
$14,290 USD
View
B
Retailer 12
-
$20,756 AUD
$14,580 USD
View
B
Retailer 13
-
$20,756 AUD
$14,580 USD
View
B
Retailer 14
-
$20,955 AUD
$14,720 USD
View
B
Retailer 15
-
$21,454 AUD
$15,070 USD
View
B
Retailer 16
-
$21,755 AUD
€14,554 EUR
View
B
Retailer 17
-
$25,618 AUD
$17,995 USD
View
B
Retailer 18
-
$26,567 AUD
ZAR 301,479 ZAR
View
Most Expensive
B
MOH London
6AEEE2EE4 · Nov 1
$28,242 AUD
£15,621 GBP
View
18 more retailers have this diamond
Prices start from $15,923 AUDSave up to $12,319 AUD

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
$15,923 AUD