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Round|Natural|GIA

1.51ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 6392613089

Certificate GIA 6392613089

Diamond specifications and retailer prices

From $15,033 AUD
$10,560 USD
As of October 25, 2026
Save $14,492 AUD (49%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $29,525 AUD at Diamond Quarter · As of October 31, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6392613089. Listed at 18 retailers as of October 25, 2026, with prices from $15,033 to $29,525, a $14,492 spread on the same certified stone. Diamond Quarter lists it at $29,525. 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
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6392613089
Dimensions7.34 × 7.29 × 4.55 mm
L/W Ratio1.01
Top View
7.34 mm7.29 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6392613089
Side View
Table 59.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 62.2%

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: Oct 25
Current: $20,447 AUD|Low: $14,176 AUD|High: $28,354 AUD|Avg: $20,232 AUD|+3.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 5$15,033 AUD
Retailer 6$17,012 AUD
Retailer 8$17,012 AUD
Retailer 3$18,278 AUD
Retailer 2$18,430 AUD
Retailer 7$18,713 AUD
Retailer 1$20,447 AUD
Retailer 9$21,266 AUD
Retailer 4$26,711 AUD
Retailer 10$28,354 AUD

42 data points across 10 retailers

18 retailers$15,033 AUD to $29,525 AUD

B+
Cheapest Retailer
-
$15,033 AUD
$10,560 USD
B+
Retailer 2
-
$15,522 AUD
$10,903 USD
View
B+
Retailer 3
-
$15,783 AUD
$11,087 USD
View
B+
Retailer 4
-
$16,020 AUD
CA$15,630 CAD
View
B+
Retailer 5
-
$17,012 AUD
$11,950 USD
View
B+
Retailer 6
-
$17,012 AUD
$11,950 USD
View
Final sale: no returns
B+
Retailer 7
-
$18,278 AUD
£10,109 GBP
View
B
Retailer 8
-
$18,430 AUD
$12,946 USD
View
B
Retailer 9
-
$18,713 AUD
$13,145 USD
View
B
Retailer 10
-
$19,674 AUD
$13,820 USD
View
B
Retailer 11
-
$19,674 AUD
$13,820 USD
View
B
Retailer 12
-
$19,696 AUD
$13,835 USD
View
B
Retailer 13
-
$20,329 AUD
$14,280 USD
View
B
Retailer 14
-
$20,447 AUD
€13,679 EUR
View
B
Retailer 15
-
$21,266 AUD
$14,938 USD
View
B
Retailer 16
-
$26,711 AUD
£14,774 GBP
View
B
Retailer 17
-
$28,354 AUD
$19,917 USD
View
Most Expensive
B
Diamond Quarter
1.51SI2D638976D1N · Oct 31
$29,525 AUD
£16,331 GBP
View
17 more retailers have this diamond
Prices start from $15,033 AUDSave up to $14,492 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
$15,033 AUD