Round|Natural|GIA

1.40ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 6551282718

Certificate GIA 6551282718

Diamond specifications and retailer prices

From $3,667 USD
As of October 31, 2026
Save $3,845 USD (51%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $7,512 USD at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 1.4ct natural round diamond

This 1.4ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6551282718. Listed at 11 retailers as of October 30, 2026, with a 105% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.40
Carat
H
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6551282718
Dimensions7.16 × 7.10 × 4.42 mm
L/W Ratio1.01
Star length50%
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.16 mm7.10 mm1.40 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551282718
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.0%

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: $4,627 USD|Low: $3,583 USD|High: $6,904 USD|Avg: $4,546 USD|+10.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 4$3,583 USD
Retailer 10$3,667 USD
Retailer 8$3,750 USD
Retailer 12$3,863 USD
Retailer 9$4,292 USD
Retailer 11$4,292 USD
Retailer 6$4,426 USD
Retailer 2$4,597 USD
Retailer 1$4,627 USD
Retailer 3$4,811 USD
Retailer 7$6,296 USD
Retailer 5$6,868 USD

18 data points across 12 retailers

11 retailers$3,667 USD to $7,512 USD

A
Cheapest Retailer
-
$3,667 USD
A
Retailer 2
-
$3,750 USD
CA$5,208 CAD
View
A
Retailer 3
-
$3,863 USD
View
B+
Retailer 4
-
$4,292 USD
View
B+
Retailer 5
-
$4,292 USD
View
B+
Retailer 6
-
$4,426 USD
£3,485 GBP
View
B+
Retailer 7
-
$4,627 USD
€4,407 EUR
View
B
Retailer 8
-
$6,296 USD
View
B
Retailer 9
-
$6,868 USD
£5,408 GBP
View
B
Retailer 10
-
$7,512 USD
View
Most Expensive
NZ Jewellers
b78d502c-87d6-4fc5-8a3b-dab2837e037d · Oct 20
$7,512 USD
View
Price last confirmed 11 days ago
10 more retailers have this diamond
Prices start from $3,667 USDSave up to $3,845 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
1.40ct Round
$3,667 USD