Marquise|Natural|GIA

0.51ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 1563140120

Certificate GIA 1563140120

Diamond specifications and retailer prices

From $456 USD
SGD 616 SGD
As of October 31, 2026
Save $464 USD (50%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $919 USD at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1563140120. Listed at 10 retailers as of October 31, 2026, with prices from $456 to $919, a $464 spread on the same certified stone. Frank Darling lists it at $919. 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

0.51
Carat
H
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1563140120
Dimensions8.32 × 4.12 × 2.41 mm
L/W Ratio2.02
Culet sizeNone
Top View
8.32 mm4.12 mm0.51 ctH / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1563140120
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 58.4%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: $919 USD|Low: $456 USD|High: $944 USD|Avg: $670 USD|-2.6%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 8$456 USD
Retailer 9$490 USD
Retailer 3$505 USD
Retailer 7$576 USD
Retailer 6$638 USD
Retailer 5$686 USD
Retailer 2$701 USD
Retailer 4$719 USD
Retailer 10$742 USD
Frank Darling$919 USD

38 data points across 10 retailers

10 retailers$456 USD to $919 USD

A
Cheapest Retailer
-
$456 USD
SGD 616 SGD
A
Retailer 2
-
$490 USD
SGD 662 SGD
View
A
Retailer 3
-
$505 USD
View
A
Retailer 4
-
$576 USD
£454 GBP
View
B+
Retailer 5
-
$638 USD
View
B+
Retailer 6
-
$686 USD
View
B+
Retailer 7
-
$701 USD
€668 EUR
View
B+
Retailer 8
-
$719 USD
View
B+
Retailer 9
-
$742 USD
View
Most Expensive
B
Frank Darling
2679945HK · Nov 2
$919 USD
View
9 more retailers have this diamond
Prices start from $456 USDSave up to $464 USD

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
0.51ct Marquise
$456 USD