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Marquise|Natural|GIA

1.51ct D SI1 Marquise Natural Diamond

GD • D/SI1 • GIA 6452767979

Certificate GIA 6452767979

Diamond specifications and retailer prices

From $15,653 AUD
$10,970 USD
As of November 1, 2026
Save $13,478 AUD (46%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $29,132 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6452767979. Listed at 12 retailers as of October 30, 2026, with prices from $15,653 to $29,132, a $13,478 spread on the same certified stone. NZ Jewellers lists it at $29,132. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
D
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6452767979
Dimensions11.20 × 6.10 × 3.80 mm
L/W Ratio1.84
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Indented Natural, Needle
Top View
11.20 mm6.10 mm1.51 ctD / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6452767979
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 62.2%

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: $21,082 AUD|Low: $15,653 AUD|High: $27,628 AUD|Avg: $20,804 AUD|+2.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 6$15,653 AUD
Retailer 7$18,645 AUD
Retailer 2$18,649 AUD
Retailer 5$19,030 AUD
Retailer 8$19,664 AUD
Retailer 1$21,082 AUD
Retailer 4$25,679 AUD
Retailer 3$27,298 AUD

43 data points across 8 retailers

12 retailers$15,653 AUD to $29,132 AUD

B+
Cheapest Retailer
-
$15,653 AUD
$10,970 USD
B
Retailer 2
-
$17,480 AUD
$12,250 USD
View
B
Retailer 3
-
$18,645 AUD
$13,067 USD
View
B
Retailer 4
-
$18,649 AUD
£10,291 GBP
View
B
Retailer 5
-
$18,936 AUD
$13,271 USD
View
Retailer 6
-
$19,030 AUD
View
Price last confirmed 10 days ago
B
Retailer 7
-
$19,664 AUD
$13,781 USD
View
B
Retailer 8
-
$20,550 AUD
$14,402 USD
View
B
Retailer 9
-
$21,082 AUD
€14,071 EUR
View
B
Retailer 10
-
$25,679 AUD
ZAR 290,738 ZAR
View
B
Retailer 11
-
$27,298 AUD
£15,064 GBP
View
Most Expensive
C
NZ Jewellers
e89861c4-af17-49d4-9b0d-118670f8c394 · Oct 30
$29,132 AUD
$20,416 USD
View
11 more retailers have this diamond
Prices start from $15,653 AUDSave up to $13,478 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 Marquise
$15,653 AUD