Cushion|Natural|GIA

1.00ct H SI1 Cushion Natural Diamond

ID • H/SI1 • GIA 1398673309

Certificate GIA 1398673309

Diamond specifications and retailer prices

From $1,638 USD
HK$12,800 HKD
As of November 1, 2026
Save $2,225 USD (58%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,863 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1398673309. Listed at 15 retailers as of November 1, 2026, with prices from $1,638 to $3,863, a $2,225 spread on the same certified stone. MOH London lists it at $3,863. 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

1.00
Carat
H
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1398673309
Dimensions5.85 × 5.77 × 3.89 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather, Needle, Natural
Top View
5.85 mm5.77 mm1.00 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1398673309
Side View
Table 63.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 67.4%

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: Nov 1
Current: $3,863 USD|Low: $1,626 USD|High: $4,384 USD|Avg: $2,525 USD|-0.9%
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
November 1, 2026
Retailer 8$1,638 USD
Retailer 3$1,934 USD
Retailer 11$2,035 USD
Retailer 12$2,092 USD
Retailer 2$2,151 USD
Retailer 13$2,220 USD
Retailer 4$2,310 USD
Retailer 6$2,344 USD
Retailer 7$2,420 USD
Retailer 9$2,711 USD
Retailer 14$2,712 USD
Retailer 10$2,754 USD
MOH London$3,863 USD
Retailer 5$4,384 USD

26 data points across 14 retailers

15 retailers$1,638 USD to $3,863 USD

A
Cheapest Retailer
-
$1,638 USD
HK$12,800 HKD
B+
Retailer 2
-
$1,934 USD
View
B+
Retailer 3
-
$1,992 USD
View
B+
Retailer 4
-
$2,035 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,092 USD
View
B+
Retailer 6
-
$2,151 USD
£1,694 GBP
View
B+
Retailer 7
-
$2,220 USD
View
B+
Retailer 8
-
$2,278 USD
SGD 3,079 SGD
View
B+
Retailer 9
-
$2,310 USD
View
B+
Retailer 10
-
$2,344 USD
View
B+
Retailer 11
-
$2,420 USD
£1,905 GBP
View
B+
Retailer 12
-
$2,711 USD
ZAR 43,791 ZAR
View
Retailer 13
-
$2,712 USD
A$4,172 AUD
View
Price last confirmed 26 days ago
B+
Retailer 14
-
$2,754 USD
€2,623 EUR
View
Most Expensive
B
MOH London
A64957593 · Nov 1
$3,863 USD
£3,042 GBP
View
14 more retailers have this diamond
Prices start from $1,638 USDSave up to $2,225 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
1.00ct Cushion
$1,638 USD