CaratHunter
Plans
Marquise|Natural|GIA

1.51ct F SI1 Marquise Natural Diamond

ID • F/SI1 • GIA 2557248303

Certificate GIA 2557248303

Diamond specifications and retailer prices

From $14,449 AUD
$10,126 USD
As of November 1, 2026
Save $5,058 AUD (26%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $19,507 AUD at 77 Diamonds · As of November 1, 2026
View at 77 Diamonds

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded F 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 2557248303. Listed at 4 retailers as of November 1, 2026, with prices from $14,449 to $19,507, a $5,058 spread on the same certified stone. 77 Diamonds lists it at $19,507. 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
F
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557248303
Dimensions11.39 × 6.01 × 3.75 mm
L/W Ratio1.90
Top View
11.39 mm6.01 mm1.51 ctF / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557248303
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 62.4%

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: $19,507 AUD|Low: $14,449 AUD|High: $20,733 AUD|Avg: $17,187 AUD|-0.2%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 2$14,449 AUD
Retailer 10$14,740 AUD
Retailer 9$15,291 AUD
Retailer 6$16,158 AUD
Retailer 3$16,790 AUD
Retailer 4$17,220 AUD
Retailer 5$17,772 AUD
Retailer 8$17,844 AUD
Retailer 11$18,439 AUD
77 Diamonds$19,507 AUD
Retailer 7$20,733 AUD

34 data points across 11 retailers

4 retailers$14,449 AUD to $19,507 AUD

B+
Cheapest Retailer
-
$14,449 AUD
$10,126 USD
B+
Retailer 2
-
$14,740 AUD
$10,330 USD
View
B
Retailer 3
-
$16,158 AUD
$11,324 USD
View
Most Expensive
B
77 Diamonds
MQZF6ZUFXRS · Nov 1
$19,507 AUD
£10,764 GBP
View
3 more retailers have this diamond
Prices start from $14,449 AUDSave up to $5,058 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
$14,449 AUD