Round|Natural|GIA

6.57ct D FL Round Natural Diamond

EX • D/FL • GIA 5231913143

Certificate GIA 5231913143

Diamond specifications and retailer prices

From $396,381 USD
£312,111 GBP
As of October 31, 2026
Save $255,571 USD (39%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $651,952 USD at MOH London · As of November 1, 2026
View at MOH London

About this 6.57ct natural round diamond

This 6.57ct natural round sits in the over five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GIA 5231913143. Listed at 16 retailers as of October 31, 2026, with prices from $396,381 to $651,952, a $255,571 spread on the same certified stone. MOH London lists it at $651,952. At this carat range, natural pricing varies dramatically across retailers, so the cross-retailer spread on this exact stone is your single best indicator of fair price.

The 4Cs

6.57
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5231913143
Dimensions11.90 × 11.93 × 7.42 mm
L/W Ratio1.00
Top View
11.90 mm11.93 mm6.57 ctD / FL
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231913143
Side View
Table 58.0%Crown 35.5°Girdle: STK-MEDPavilion 41°Culet: NoneDepth 62.3%

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 31
Current: $651,952 USD|Low: $383,947 USD|High: $659,807 USD|Avg: $470,560 USD|-1.1%
MOH London
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
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 16$388,541 USD
Retailer 12$396,381 USD
Retailer 3$407,657 USD
Retailer 15$414,703 USD
Retailer 14$432,220 USD
Retailer 9$434,840 USD
Retailer 6$434,954 USD
Retailer 10$440,561 USD
Retailer 7$460,781 USD
Retailer 17$479,980 USD
Retailer 4$499,180 USD
Retailer 2$504,265 USD
Retailer 13$504,293 USD
Retailer 11$505,094 USD
Retailer 8$513,781 USD
Retailer 5$518,379 USD
MOH London$651,952 USD

36 data points across 17 retailers

16 retailers$396,381 USD to $651,952 USD

Retailer 1
-
$388,541 USD
A$597,755 AUD
Price last confirmed 28 days ago
A
Retailer 2
-
$396,381 USD
£312,111 GBP
View
A
Retailer 3
-
$414,703 USD
View
Final sale: no returns
A
Retailer 4
-
$432,220 USD
View
A
Retailer 5
-
$434,840 USD
View
A
Retailer 6
-
$434,954 USD
View
A
Retailer 7
-
$440,561 USD
£346,899 GBP
View
Retailer 8
-
$460,781 USD
View
Price last confirmed 7 days ago
B+
Retailer 9
-
$479,980 USD
View
B+
Retailer 10
-
$499,180 USD
View
B+
Retailer 11
-
$504,265 USD
€480,252 EUR
View
B+
Retailer 12
-
$504,293 USD
View
B+
Retailer 13
-
$505,094 USD
ZAR 8,159,840 ZAR
View
B+
Retailer 14
-
$513,781 USD
View
B+
Retailer 15
-
$518,379 USD
View
Most Expensive
B+
MOH London
58B1E8B80 · Nov 1
$651,952 USD
£513,348 GBP
View
15 more retailers have this diamond
Prices start from $396,381 USDSave up to $255,571 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
6.57ct Round
$396,381 USD