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Marquise|Natural|GIA

1.51ct G SI2 Marquise Natural Diamond

EX • G/SI2 • GIA 1186263478

Certificate GIA 1186263478

Diamond specifications and retailer prices

From $12,353 AUD
$8,657 USD
As of November 1, 2026
Save $9,907 AUD (45%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $22,260 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1186263478. Listed at 14 retailers as of October 30, 2026, with prices from $12,353 to $22,260, a $9,907 spread on the same certified stone. NZ Jewellers lists it at $22,260. 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
G
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1186263478
Dimensions10.65 × 6.09 × 3.81 mm
L/W Ratio1.75
Culet sizeSmall
Top View
10.65 mm6.09 mm1.51 ctG / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1186263478
Side View
Table 58.0%CrownGirdle: THN-VTKPavilionCulet: SmallDepth 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: Nov 1
Current: $22,260 AUD|Low: $12,353 AUD|High: $22,260 AUD|Avg: $16,345 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 4$12,353 AUD
Retailer 8$13,356 AUD
Retailer 3$13,467 AUD
Retailer 9$14,469 AUD
Retailer 5$14,495 AUD
Retailer 7$14,691 AUD
Retailer 2$16,034 AUD
Retailer 10$16,695 AUD
Retailer 11$17,577 AUD
Retailer 12$19,184 AUD
Retailer 6$20,858 AUD
NZ Jewellers$22,260 AUD

41 data points across 12 retailers

14 retailers$12,353 AUD to $22,260 AUD

B+
Cheapest Retailer
-
$12,353 AUD
$8,657 USD
B+
Retailer 2
-
$12,504 AUD
$8,763 USD
View
B+
Retailer 3
-
$12,951 AUD
CA$12,606 CAD
View
B+
Retailer 4
-
$13,356 AUD
$9,360 USD
View
B+
Retailer 5
-
$13,467 AUD
$9,438 USD
View
B+
Retailer 6
-
$14,469 AUD
$10,140 USD
View
B+
Retailer 7
-
$14,495 AUD
£7,999 GBP
View
B+
Retailer 8
-
$14,691 AUD
$10,296 USD
View
B
Retailer 9
-
$15,396 AUD
$10,790 USD
View
B
Retailer 10
-
$16,034 AUD
€10,702 EUR
View
B
Retailer 11
-
$16,695 AUD
$11,700 USD
View
Retailer 12
-
$17,577 AUD
$12,318 USD
View
Price last confirmed 10 days ago
B
Retailer 13
-
$20,858 AUD
£11,510 GBP
View
Most Expensive
B
NZ Jewellers
820b5d22-e9e2-4532-819b-2b1403d0e7c4 · Oct 30
$22,260 AUD
$15,600 USD
View
13 more retailers have this diamond
Prices start from $12,353 AUDSave up to $9,907 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
$12,353 AUD