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Round|Natural|GIA

0.90ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5566560520

Certificate GIA 5566560520

Diamond specifications and retailer prices

From $1,164 USD
As of November 6, 2026
Save $2,558 USD (69%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $3,801 USD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.9ct natural round diamond

This 0.9ct natural round sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5566560520. Listed at 18 retailers as of November 2, 2026, with a 220% 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

0.90
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 5566560520
Dimensions6.18 × 6.20 × 3.84 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather
Top View
6.18 mm6.20 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 5566560520
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.0%

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: $3,801 USD|Low: $1,152 USD|High: $3,801 USD|Avg: $1,935 USD
NZ Jewellers
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
Retailer 18
November 2, 2026
Retailer 15$1,164 USD
Retailer 13$1,216 USD
Retailer 7$1,415 USD
Retailer 8$1,430 USD
Retailer 17$1,500 USD
Retailer 10$1,545 USD
Retailer 4$1,558 USD
Retailer 18$1,558 USD
Retailer 9$1,624 USD
Retailer 3$1,630 USD
Retailer 6$1,694 USD
Retailer 11$1,721 USD
Retailer 5$1,798 USD
Retailer 12$2,118 USD
Retailer 16$2,298 USD
Retailer 14$2,730 USD
Retailer 2$3,722 USD
NZ Jewellers$3,801 USD

18 data points across 18 retailers

18 retailers$1,164 USD to $3,722 USD

A
Cheapest Retailer
-
$1,164 USD
A
Retailer 2
-
$1,216 USD
View
B+
Retailer 3
-
$1,415 USD
View
B+
Retailer 4
-
$1,430 USD
View
B+
Retailer 5
-
$1,500 USD
View
B
Retailer 6
-
$1,545 USD
View
Retailer 7
-
$1,558 USD
View
Price last confirmed 8 days ago
B
Retailer 8
-
$1,558 USD
View
Retailer 9
-
$1,624 USD
View
Price last confirmed 10 days ago
B
Retailer 10
-
$1,630 USD
View
B
Retailer 11
-
$1,694 USD
View
B
Retailer 12
-
$1,721 USD
View
B
Retailer 13
-
$1,798 USD
View
B
Retailer 14
-
$2,118 USD
View
B
Retailer 15
-
$2,298 USD
View
B
Retailer 16
-
$2,730 USD
View
B
Retailer 17
-
$3,722 USD
View
Most Expensive
NZ Jewellers
963deaa8-a60e-43fa-abc0-9752fca7d4ab · Oct 30
$3,801 USD
View
Price last confirmed 7 days ago
17 more retailers have this diamond
Prices start from $1,164 USDSave up to $2,558 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 Round
$1,164 USD