Heart|Natural|GIA

0.90ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 1549115288

Certificate GIA 1549115288

Diamond specifications and retailer prices

From $742 USD
As of November 4, 2026
Save $174 USD (19%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $916 USD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 0.9ct natural heart diamond

This 0.9ct natural heart sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1549115288. Listed at 6 retailers as of November 4, 2026, with prices from $742 to $916, a $174 spread on the same certified stone. Blue Nile lists it at $916. 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

0.90
Carat
K
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1549115288
Dimensions5.55 × 6.71 × 4.10 mm
L/W Ratio1.21
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather
Top View
5.55 mm6.71 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1549115288
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 61.1%

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 4
Current: $916 USD|Low: $651 USD|High: $1,029 USD|Avg: $832 USD|-11.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$742 USD
Retailer 6$743 USD
Retailer 3$809 USD
Retailer 5$828 USD
Retailer 2$861 USD
Blue Nile$916 USD

42 data points across 6 retailers

6 retailers$742 USD to $916 USD

A
Cheapest Retailer
-
$742 USD
Final sale: no returns
A
Retailer 2
-
$743 USD
View
A
Retailer 3
-
$809 USD
View
A
Retailer 4
-
$828 USD
View
A
Retailer 5
-
$861 USD
View
Most Expensive
A
Blue Nile
27439294 · Nov 5
$916 USD
View
5 more retailers have this diamond
Prices start from $742 USDSave up to $174 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
0.90ct Heart
$742 USD