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Marquise|Natural|GIA

1.51ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 2548810416

Certificate GIA 2548810416

Diamond specifications and retailer prices

From $12,061 AUD
SGD 11,449 SGD
As of October 30, 2026
Save $9,556 AUD (44%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $21,617 AUD at With Clarity · As of October 30, 2026
View at With Clarity

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded E 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 2548810416. Listed at 16 retailers as of October 30, 2026, with prices from $12,061 to $21,617, a $9,556 spread on the same certified stone. With Clarity lists it at $21,617. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.57°
Pavilion angle38.28°
OriginNatural
Grading LabGIA
CertificateGIA 2548810416
Dimensions11.35 × 6.00 × 3.75 mm
L/W Ratio1.89
Top View
11.35 mm6.00 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2548810416
Side View
Table 57.0%Crown 39.57°Girdle: STK-THKPavilion 38.28°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $17,781 AUD|Low: $12,061 AUD|High: $22,057 AUD|Avg: $15,448 AUD|-5.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
With Clarity
October 31, 2026
Retailer 10$12,061 AUD
Retailer 11$12,663 AUD
Retailer 6$13,039 AUD
Retailer 13$13,057 AUD
Retailer 9$13,273 AUD
Retailer 14$13,335 AUD
Retailer 7$13,469 AUD
Retailer 12$13,496 AUD
Retailer 8$15,363 AUD
Retailer 3$15,429 AUD
Retailer 2$15,578 AUD
Retailer 5$15,944 AUD
Retailer 1$17,781 AUD
Retailer 4$18,957 AUD
With Clarity$21,617 AUD

31 data points across 15 retailers

16 retailers$12,061 AUD to $21,617 AUD

A
Cheapest Retailer
-
$12,061 AUD
SGD 11,449 SGD
A
Retailer 2
-
$12,663 AUD
$8,895 USD
View
A
Retailer 3
-
$13,039 AUD
$9,159 USD
View
A
Retailer 4
-
$13,057 AUD
SGD 12,394 SGD
View
A
Retailer 5
-
$13,273 AUD
$9,324 USD
View
A
Retailer 6
-
$13,335 AUD
$9,367 USD
View
A
Retailer 7
-
$13,469 AUD
£7,450 GBP
View
A
Retailer 8
-
$13,496 AUD
$9,480 USD
View
B+
Retailer 9
-
$15,363 AUD
€10,278 EUR
View
B+
Retailer 10
-
$15,429 AUD
$10,838 USD
View
B+
Retailer 11
-
$15,578 AUD
$10,943 USD
View
B+
Retailer 12
-
$15,944 AUD
$11,200 USD
View
B+
Retailer 13
-
$16,706 AUD
$11,735 USD
View
B+
Retailer 14
-
$17,781 AUD
$12,490 USD
View
B+
Retailer 15
-
$18,957 AUD
$13,316 USD
View
Most Expensive
B
With Clarity
2548810416 · Oct 30
$21,617 AUD
$15,185 USD
View
15 more retailers have this diamond
Prices start from $12,061 AUDSave up to $9,556 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.

A
1.51ct Marquise
$12,061 AUD