Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6555735876

Certificate GIA 6555735876

Diamond specifications and retailer prices

From $6,144 USD
HK$48,000 HKD
As of November 1, 2026
Save $7,819 USD (56%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $13,963 USD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6555735876. Listed at 20 retailers as of October 30, 2026, with prices from $6,144 to $13,963, a $7,819 spread on the same certified stone. NZ Jewellers lists it at $13,963. 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

1.51
Carat
H
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6555735876
Dimensions7.25 × 7.29 × 4.55 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.25 mm7.29 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555735876
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $13,963 USD|Low: $6,093 USD|High: $13,963 USD|Avg: $8,640 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
Retailer 19
November 1, 2026
Retailer 15$6,144 USD
Retailer 7$6,596 USD
Retailer 9$6,980 USD
Retailer 5$6,982 USD
Retailer 18$6,985 USD
Retailer 3$7,563 USD
Retailer 8$7,680 USD
Retailer 13$7,827 USD
Retailer 17$8,006 USD
Retailer 4$8,340 USD
Retailer 10$8,340 USD
Retailer 16$8,346 USD
Retailer 19$8,620 USD
Retailer 6$8,727 USD
Retailer 11$9,196 USD
Retailer 2$9,252 USD
Retailer 14$10,256 USD
Retailer 12$11,634 USD
NZ Jewellers$13,963 USD

35 data points across 19 retailers

20 retailers$6,144 USD to $13,963 USD

B+
Cheapest Retailer
-
$6,144 USD
HK$48,000 HKD
B+
Retailer 2
-
$6,272 USD
A$9,650 AUD
View
B+
Retailer 3
-
$6,596 USD
View
B+
Retailer 4
-
$6,980 USD
View
Final sale: no returns
B+
Retailer 5
-
$6,982 USD
View
B+
Retailer 6
-
$6,985 USD
View
B
Retailer 7
-
$7,563 USD
View
B+
Retailer 8
-
$7,680 USD
View
B+
Retailer 9
-
$7,827 USD
£6,163 GBP
View
Retailer 10
-
$8,006 USD
A$12,317 AUD
View
Price last confirmed 11 days ago
B
Retailer 11
-
$8,340 USD
View
B
Retailer 12
-
$8,340 USD
View
B+
Retailer 13
-
$8,346 USD
€7,949 EUR
View
B
Retailer 14
-
$8,620 USD
View
B
Retailer 15
-
$8,727 USD
View
Retailer 16
-
$9,196 USD
View
Price last confirmed 9 days ago
B
Retailer 17
-
$9,252 USD
£7,285 GBP
View
B
Retailer 18
-
$10,256 USD
ZAR 165,691 ZAR
View
B
Retailer 19
-
$11,634 USD
£9,161 GBP
View
Most Expensive
B
NZ Jewellers
709b4404-daec-4c0b-b654-fb474c7a1d60 · Oct 30
$13,963 USD
View
19 more retailers have this diamond
Prices start from $6,144 USDSave up to $7,819 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.

B+
1.51ct Round
$6,144 USD