Round|Natural|GIA

1.28ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2247034235

Certificate GIA 2247034235

Diamond specifications and retailer prices

From $3,546 USD
As of November 5, 2026
Save $1,506 USD (30%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $8,405 USD at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 1.28ct natural round diamond

This 1.28ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2247034235. Listed at 20 retailers as of November 5, 2026, with a 42% 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

1.28
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2247034235
Dimensions6.92 × 6.88 × 4.35 mm
L/W Ratio1.01
Top View
6.92 mm6.88 mm1.28 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2247034235
Side View
Table 57.0%CrownGirdle: Sli. ThickPavilionCulet: NoneDepth 63.2%

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: Nov 5
Current: $5,052 USD|Low: $3,387 USD|High: $7,776 USD|Avg: $4,674 USD|+10.5%
Retailer 1
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 6, 2026
Retailer 9$3,546 USD
Retailer 16$3,698 USD
Retailer 11$3,740 USD
Retailer 7$3,845 USD
Retailer 15$4,029 USD
Retailer 5$4,145 USD
Retailer 6$4,346 USD
Retailer 13$4,476 USD
Retailer 8$4,630 USD
Retailer 12$4,630 USD
Retailer 17$4,790 USD
Retailer 2$4,888 USD
Retailer 10$4,958 USD
Retailer 1$5,052 USD
Retailer 4$5,326 USD
Retailer 3$5,817 USD
Retailer 14$7,755 USD

39 data points across 17 retailers

20 retailers$3,546 USD to $5,052 USD

A
Cheapest Retailer
-
$3,546 USD
B+
Retailer 2
-
$3,740 USD
View
B+
Retailer 3
-
$3,760 USD
View
B+
Retailer 4
-
$3,910 USD
View
B+
Retailer 5
-
$4,029 USD
View
Retailer 6
-
$4,371 USD
View
Price last confirmed 29 days ago
Retailer 7
-
$4,371 USD
View
Price last confirmed 29 days ago
Retailer 8
-
$4,371 USD
View
Price last confirmed 38 days ago
B+
Retailer 9
-
$4,476 USD
View
B
Retailer 10
-
$4,630 USD
View
B
Retailer 11
-
$4,630 USD
View
B
Retailer 12
-
$4,790 USD
View
Retailer 13
-
$4,888 USD
View
Price last confirmed 33 days ago
B
Retailer 14
-
$4,958 USD
View
Retailer 15
-
$5,043 USD
View
Price last confirmed 38 days ago
B+
Retailer 16
-
$5,052 USD
View
Retailer 17
-
$5,326 USD
View
Price last confirmed 29 days ago
Retailer 18
-
$5,817 USD
View
Price last confirmed 37 days ago
Retailer 19
-
$7,755 USD
View
Price last confirmed 29 days ago
Most Expensive
NZ Jewellers
55f578f1-354a-4ea5-8be4-20ec29b3a72f · Sep 27
$8,405 USD
View
Price last confirmed 40 days ago
19 more retailers have this diamond
Prices start from $3,546 USDSave up to $1,506 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
1.28ct Round
$3,546 USD