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Marquise|Natural|GIA

1.51ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 5553335027

Certificate GIA 5553335027

Diamond specifications and retailer prices

From $16,658 AUD
$11,674 USD
As of October 27, 2026
12 retailers carry this diamond
Most expensive: $22,135 AUD at NZ Jewellers · As of October 24, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5553335027. Listed at 12 retailers as of October 27, 2026. 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
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5553335027
Dimensions11.41 × 5.95 × 3.78 mm
L/W Ratio1.92
Culet sizeNone
Key to symbols
Twinning Wisp
Top View
11.41 mm5.95 mm1.51 ctI / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 5553335027
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 27
Current: $14,446 AUD|Low: $10,622 AUD|High: $20,992 AUD|Avg: $15,616 AUD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 27, 2026
Retailer 9$10,622 AUD
Retailer 4$12,435 AUD
Retailer 6$13,391 AUD
Retailer 1$14,446 AUD
Retailer 2$15,559 AUD
Retailer 8$16,658 AUD
Retailer 5$17,480 AUD
Retailer 7$18,933 AUD
Retailer 3$20,769 AUD

36 data points across 9 retailers

12 retailers

Retailer 1
-
$12,435 AUD
$8,715 USD
Price last confirmed 7 days ago
Retailer 2
-
$13,282 AUD
$9,308 USD
View
Price last confirmed 8 days ago
Retailer 3
-
$13,391 AUD
$9,385 USD
View
Price last confirmed 7 days ago
Retailer 4
-
$14,387 AUD
$10,083 USD
View
Price last confirmed 7 days ago
Retailer 5
-
$14,446 AUD
£7,972 GBP
View
Price last confirmed 7 days ago
Retailer 6
-
$14,609 AUD
$10,238 USD
View
Price last confirmed 8 days ago
Retailer 7
-
$15,559 AUD
€10,385 EUR
View
Price last confirmed 7 days ago
Retailer 8
-
$16,602 AUD
$11,635 USD
View
Price last confirmed 10 days ago
B
Retailer 9
-
$16,658 AUD
$11,674 USD
View
Retailer 10
-
$17,480 AUD
$12,250 USD
View
Price last confirmed 10 days ago
Retailer 11
-
$20,769 AUD
£11,461 GBP
View
Price last confirmed 7 days ago
Most Expensive
NZ Jewellers
a6473564-b211-4a65-9415-113b15da3cd8 · Oct 24
$22,135 AUD
$15,513 USD
View
Price last confirmed 9 days ago
11 more retailers have this diamond
Prices start from $16,658 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
$16,658 AUD