CaratHunter
Plans
Heart|Natural|GIA

1.00ct I SI2 Heart Natural Diamond

ID • I/SI2 • GIA 1553596973

Certificate GIA 1553596973

Diamond specifications and retailer prices

From $1,255 USD
As of November 6, 2026
Save $1,262 USD (50%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,453 USD at NZ Jewellers · As of September 26, 2026
View at NZ Jewellers

About this 1ct natural heart diamond

This 1ct natural heart sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553596973. Listed at 16 retailers as of November 1, 2026, with a 101% 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

1.00
Carat
I
Color
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle37.83°
Pavilion angle38.79°
OriginNatural
Grading LabGIA
CertificateGIA 1553596973
Dimensions6.97 × 6.08 × 3.84 mm
L/W Ratio1.15
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Crystal, Needle, Etch Channel
Top View
6.97 mm6.08 mm1.00 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1553596973
Side View
Table 64.0%Crown 37.83°Girdle: Very ThickPavilion 38.79°Culet: NoneDepth 55.1%

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 6
Current: $1,492 USD|Low: $1,010 USD|High: $2,625 USD|Avg: $1,658 USD|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 4$1,255 USD
Retailer 2$1,268 USD
Retailer 5$1,331 USD
Retailer 3$1,416 USD
Retailer 9$1,438 USD
Retailer 11$1,441 USD
Retailer 7$1,489 USD
Retailer 1$1,492 USD
Retailer 8$1,532 USD
Retailer 6$1,878 USD
Retailer 10$2,517 USD

35 data points across 11 retailers

16 retailers$1,255 USD to $2,517 USD

A
Cheapest Retailer
-
$1,255 USD
A
Retailer 2
-
$1,268 USD
View
Final sale: no returns
A
Retailer 3
-
$1,331 USD
View
Retailer 4
-
$1,416 USD
View
Price last confirmed 8 days ago
Retailer 5
-
$1,416 USD
View
Price last confirmed 41 days ago
Retailer 6
-
$1,416 USD
View
Price last confirmed 21 days ago
A
Retailer 7
-
$1,438 USD
View
A
Retailer 8
-
$1,441 USD
View
A
Retailer 9
-
$1,489 USD
View
A
Retailer 10
-
$1,492 USD
View
A
Retailer 11
-
$1,532 USD
View
Retailer 12
-
$1,634 USD
View
Price last confirmed 61 days ago
Retailer 13
-
$1,634 USD
View
Price last confirmed 43 days ago
B+
Retailer 14
-
$1,878 USD
View
B+
Retailer 15
-
$2,517 USD
View
Most Expensive
NZ Jewellers
d70c30ee-10c2-461f-a977-d0efbba75e88 · Sep 26
$3,453 USD
View
Price last confirmed 41 days ago
15 more retailers have this diamond
Prices start from $1,255 USDSave up to $1,262 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 Heart
$1,255 USD