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Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1435831747

Certificate GIA 1435831747

Diamond specifications and retailer prices

From $2,900 USD
As of October 31, 2026
Save $4,228 USD (59%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: $7,128 USD at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1435831747. Listed at 27 retailers as of October 29, 2026, with prices from $2,900 to $7,128, a $4,228 spread on the same certified stone. Diamond Quarter lists it at $7,128. 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
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
Crown angle33°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1435831747
Dimensions6.55 × 6.47 × 3.82 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Key to symbols
Crystal, Feather, Cavity, Needle, Natural
Top View
6.55 mm6.47 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1435831747
Side View
Table 61.0%Crown 33°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 58.6%

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: $4,240 USD|Low: $2,683 USD|High: $6,725 USD|Avg: $4,008 USD|+5.5%
Retailer 1
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Retailer 24
November 1, 2026
Retailer 5$2,900 USD
Retailer 6$2,966 USD
Retailer 24$3,060 USD
Retailer 11$3,104 USD
Retailer 16$3,169 USD
Retailer 13$3,227 USD
Retailer 7$3,365 USD
Retailer 3$3,497 USD
Retailer 8$3,497 USD
Retailer 4$3,631 USD
Retailer 2$3,803 USD
Retailer 18$3,924 USD
Retailer 17$3,979 USD
Retailer 10$4,035 USD
Retailer 20$4,040 USD
Retailer 21$4,040 USD
Retailer 14$4,153 USD
Retailer 22$4,170 USD
Retailer 1$4,240 USD
Retailer 15$4,370 USD
Retailer 23$4,451 USD
Retailer 19$4,745 USD
Retailer 12$6,455 USD
Retailer 9$6,725 USD

37 data points across 24 retailers

27 retailers$2,900 USD to $7,128 USD

A
Cheapest Retailer
-
$2,900 USD
A
Retailer 2
-
$2,966 USD
View
Retailer 3
-
$3,060 USD
View
B+
Retailer 4
-
$3,104 USD
View
B+
Retailer 5
-
$3,169 USD
View
B+
Retailer 6
-
$3,213 USD
A$4,943 AUD
View
B+
Retailer 7
-
$3,227 USD
View
Final sale: no returns
B+
Retailer 8
-
$3,365 USD
View
Retailer 9
-
$3,497 USD
View
Price last confirmed 10 days ago
Retailer 10
-
$3,497 USD
View
Price last confirmed 8 days ago
Retailer 11
-
$3,631 USD
View
Price last confirmed 10 days ago
Retailer 12
-
$3,659 USD
View
Price last confirmed 20 days ago
B+
Retailer 13
-
$3,803 USD
View
B+
Retailer 14
-
$3,924 USD
£3,090 GBP
View
Retailer 15
-
$3,979 USD
A$6,122 AUD
View
Price last confirmed 23 days ago
Retailer 16
-
$4,035 USD
View
Price last confirmed 9 days ago
B
Retailer 17
-
$4,040 USD
View
B
Retailer 18
-
$4,040 USD
View
B+
Retailer 19
-
$4,153 USD
View
B+
Retailer 20
-
$4,170 USD
View
B+
Retailer 21
-
$4,240 USD
€4,038 EUR
View
Retailer 22
-
$4,370 USD
View
Price last confirmed 9 days ago
B+
Retailer 23
-
$4,451 USD
£3,505 GBP
View
B
Retailer 24
-
$4,745 USD
ZAR 76,651 ZAR
View
B
Retailer 25
-
$6,455 USD
£5,083 GBP
View
Retailer 26
-
$6,725 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Diamond Quarter
1.0SI1D1447F491N · Oct 29
$7,128 USD
£5,612 GBP
View
26 more retailers have this diamond
Prices start from $2,900 USDSave up to $4,228 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 Round
$2,900 USD