Heart|Natural|GIA

0.91ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 5231889631

Certificate GIA 5231889631

Diamond specifications and retailer prices

From $973 USD
HK$7,600 HKD
As of October 31, 2026
Save $742 USD (43%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,595 USD at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 0.91ct natural heart diamond

This 0.91ct natural heart sits in the just-under-one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5231889631. Listed at 16 retailers as of October 31, 2026, with a 76% 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

0.91
Carat
E
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Pavilion angle38°
OriginNatural
Grading LabGIA
CertificateGIA 5231889631
Dimensions6.09 × 6.75 × 3.83 mm
L/W Ratio1.11
Top View
6.09 mm6.75 mm0.91 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5231889631
Side View
Table 58.0%CrownGirdle: STK-VTKPavilion 38°Culet: NoneDepth 56.7%

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: Oct 31
Current: $1,190 USD|Low: $934 USD|High: $2,872 USD|Avg: $1,613 USD|-7.3%
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
October 31, 2026
Retailer 9$973 USD
Retailer 1$1,190 USD
Retailer 2$1,216 USD
Retailer 11$1,232 USD
Retailer 13$1,244 USD
Retailer 10$1,248 USD
Retailer 15$1,280 USD
Retailer 16$1,350 USD
Retailer 12$1,395 USD
Retailer 3$1,430 USD
Retailer 7$1,724 USD
Retailer 5$1,823 USD
Retailer 6$1,934 USD
Retailer 14$1,938 USD
Retailer 8$2,443 USD
Retailer 4$2,569 USD

30 data points across 16 retailers

16 retailers$973 USD to $1,715 USD

A
Cheapest Retailer
-
$973 USD
HK$7,600 HKD
A
Retailer 2
-
$1,190 USD
€1,134 EUR
View
A
Retailer 3
-
$1,216 USD
View
Final sale: no returns
A
Retailer 4
-
$1,232 USD
View
A
Retailer 5
-
$1,244 USD
View
A
Retailer 6
-
$1,248 USD
£982 GBP
View
A
Retailer 7
-
$1,280 USD
View
Retailer 8
-
$1,350 USD
SGD 1,824 SGD
View
Price last confirmed 8 days ago
A
Retailer 9
-
$1,395 USD
View
B+
Retailer 10
-
$1,715 USD
A$2,638 AUD
View
Retailer 11
-
$1,724 USD
A$2,652 AUD
View
Price last confirmed 27 days ago
Retailer 12
-
$1,934 USD
ZAR 31,250 ZAR
View
Price last confirmed 27 days ago
Retailer 13
-
$1,938 USD
View
Price last confirmed 7 days ago
Retailer 14
-
$2,443 USD
£1,924 GBP
View
Price last confirmed 26 days ago
Retailer 15
-
$2,569 USD
£2,023 GBP
View
Price last confirmed 22 days ago
Most Expensive
NZ Jewellers
abe365ce-3079-4e6a-bb65-d767b28415f3 · Sep 25
$3,595 USD
View
Price last confirmed 36 days ago
15 more retailers have this diamond
Prices start from $973 USDSave up to $742 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
0.91ct Heart
$973 USD