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Marquise|Natural|GIA

1.20ct G SI1 Marquise Natural Diamond

ID • G/SI1 • GIA 6545625677

Certificate GIA 6545625677

Diamond specifications and retailer prices

From $9,507 AUD
As of November 6, 2026
Save $5,753 AUD (38%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $18,916 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded G 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 6545625677. Listed at 12 retailers as of November 4, 2026, with a 61% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.20
Carat
G
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6545625677
Dimensions11.89 × 5.23 × 3.31 mm
L/W Ratio2.27
Top View
11.89 mm5.23 mm1.20 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6545625677
Side View
Table 59.0%CrownGirdle: ThickPavilionCulet: NoneDepth 63.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $18,916 AUD|Low: $9,386 AUD|High: $18,916 AUD|Avg: $11,796 AUD|+1.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 7, 2026
Retailer 9$9,507 AUD
Retailer 5$9,719 AUD
Retailer 8$9,776 AUD
Retailer 7$10,435 AUD
Retailer 6$10,557 AUD
Retailer 10$10,707 AUD
Retailer 4$10,806 AUD
Retailer 11$11,244 AUD
Retailer 2$11,407 AUD
Retailer 3$12,262 AUD
Retailer 12$13,799 AUD
Retailer 13$15,260 AUD
NZ Jewellers$18,916 AUD

16 data points across 13 retailers

12 retailers$9,507 AUD to $15,260 AUD

B
Cheapest Retailer
-
$9,507 AUD
B
Retailer 2
-
$9,776 AUD
View
B
Retailer 3
-
$10,435 AUD
View
B
Retailer 4
-
$10,557 AUD
View
B
Retailer 5
-
$10,707 AUD
View
Retailer 6
-
$10,806 AUD
View
Price last confirmed 35 days ago
B
Retailer 7
-
$11,244 AUD
View
B
Retailer 8
-
$11,407 AUD
View
B
Retailer 9
-
$12,262 AUD
View
B
Retailer 10
-
$13,799 AUD
View
B
Retailer 11
-
$15,260 AUD
View
Most Expensive
NZ Jewellers
7c049642-ce40-4b7b-9fc2-ef4b83bc0466 · Nov 5
$18,916 AUD
$12,997 USD
View
Price under review
11 more retailers have this diamond
Prices start from $9,507 AUDSave up to $5,753 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
1.20ct Marquise
$9,507 AUD