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Round|Natural|GIA

1.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 7553158400

Certificate GIA 7553158400

Diamond specifications and retailer prices

From $10,475 AUD
$7,358 USD
As of November 1, 2026
Save $12,633 AUD (55%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $23,108 AUD 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7553158400. Listed at 24 retailers as of October 30, 2026, with prices from $10,475 to $23,108, a $12,633 spread on the same certified stone. NZ Jewellers lists it at $23,108. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 7553158400
Dimensions7.31 × 7.28 × 4.56 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
7.31 mm7.28 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 7553158400
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.5%

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: $23,108 AUD|Low: $10,075 AUD|High: $23,108 AUD|Avg: $14,661 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 8$11,083 AUD
Retailer 3$11,554 AUD
Retailer 10$12,516 AUD
Retailer 2$12,707 AUD
Retailer 9$12,708 AUD
Retailer 7$12,764 AUD
Retailer 4$14,296 AUD
Retailer 11$14,442 AUD
Retailer 6$16,973 AUD
Retailer 5$19,255 AUD
NZ Jewellers$23,108 AUD

43 data points across 11 retailers

24 retailers$10,475 AUD to $23,108 AUD

B+
Cheapest Retailer
-
$10,475 AUD
$7,358 USD
B+
Retailer 2
-
$10,791 AUD
View
B+
Retailer 3
-
$10,818 AUD
$7,599 USD
View
B+
Retailer 4
-
$11,083 AUD
$7,785 USD
View
Final sale: no returns
B+
Retailer 5
-
$11,126 AUD
$7,816 USD
View
B+
Retailer 6
-
$11,354 AUD
CA$11,077 CAD
View
B+
Retailer 7
-
$11,496 AUD
$8,075 USD
View
B+
Retailer 8
-
$11,554 AUD
$8,116 USD
View
B+
Retailer 9
-
$12,516 AUD
$8,792 USD
View
B+
Retailer 10
-
$12,707 AUD
£7,028 GBP
View
B
Retailer 11
-
$12,708 AUD
$8,927 USD
View
Retailer 12
-
$12,764 AUD
View
Price last confirmed 9 days ago
B
Retailer 13
-
$12,821 AUD
$9,006 USD
View
B+
Retailer 14
-
$13,278 AUD
$9,327 USD
View
B+
Retailer 15
-
$13,695 AUD
$9,620 USD
View
B+
Retailer 16
-
$13,695 AUD
$9,620 USD
View
B
Retailer 17
-
$14,151 AUD
$9,940 USD
View
B+
Retailer 18
-
$14,296 AUD
€9,564 EUR
View
B
Retailer 19
-
$14,442 AUD
$10,145 USD
View
B
Retailer 20
-
$14,743 AUD
$10,356 USD
View
Retailer 21
-
$15,211 AUD
$10,685 USD
View
Price last confirmed 10 days ago
B
Retailer 22
-
$16,973 AUD
ZAR 192,615 ZAR
View
B
Retailer 23
-
$19,255 AUD
£10,650 GBP
View
Most Expensive
B
NZ Jewellers
eb3c1a88-f45c-4c03-a97a-4d4757043811 · Oct 30
$23,108 AUD
$16,232 USD
View
23 more retailers have this diamond
Prices start from $10,475 AUDSave up to $12,633 AUD

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
$10,475 AUD