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Round|Natural|GIA

2.50ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1518212262

Certificate GIA 1518212262

Diamond specifications and retailer prices

From $43,023 AUD
$30,221 USD
As of October 30, 2026
Save $35,965 AUD (46%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $78,988 AUD at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 2.5ct natural round diamond

This 2.5ct natural round sits in the two to three carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1518212262. Listed at 20 retailers as of October 29, 2026, with prices from $43,023 to $78,988, a $35,965 spread on the same certified stone. Diamond Quarter lists it at $78,988. 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

2.50
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 1518212262
Dimensions8.76 × 8.82 × 5.31 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Feather, Twinning Wisp, Cloud, Natural
Top View
8.76 mm8.82 mm2.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1518212262
Side View
Table 61.0%Crown 32.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 60.5%

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: Oct 30
Current: $56,993 AUD|Low: $43,023 AUD|High: $75,944 AUD|Avg: $53,120 AUD|+2.1%
Retailer 1
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
October 31, 2026
Retailer 11$43,023 AUD
Retailer 8$43,744 AUD
Retailer 10$46,658 AUD
Retailer 9$47,633 AUD
Retailer 13$48,022 AUD
Retailer 4$48,048 AUD
Retailer 16$48,514 AUD
Retailer 3$50,050 AUD
Retailer 17$50,451 AUD
Retailer 2$51,376 AUD
Retailer 6$52,053 AUD
Retailer 12$52,390 AUD
Retailer 7$54,054 AUD
Retailer 18$56,012 AUD
Retailer 1$56,993 AUD
Retailer 5$57,265 AUD
Retailer 19$60,161 AUD
Retailer 15$66,087 AUD
Retailer 14$75,441 AUD

29 data points across 19 retailers

20 retailers$43,023 AUD to $78,988 AUD

B+
Cheapest Retailer
-
$43,023 AUD
$30,221 USD
B+
Retailer 2
-
$43,744 AUD
$30,728 USD
View
B+
Retailer 3
-
$46,658 AUD
$32,775 USD
View
Retailer 4
-
$47,633 AUD
View
Price last confirmed 28 days ago
B+
Retailer 5
-
$48,022 AUD
£26,561 GBP
View
B+
Retailer 6
-
$48,048 AUD
$33,751 USD
View
B+
Retailer 7
-
$48,514 AUD
CA$47,331 CAD
View
B+
Retailer 8
-
$50,050 AUD
$35,157 USD
View
B+
Retailer 9
-
$50,451 AUD
$35,439 USD
View
B
Retailer 10
-
$51,376 AUD
$36,089 USD
View
B
Retailer 11
-
$52,053 AUD
$36,564 USD
View
B+
Retailer 12
-
$52,390 AUD
£28,977 GBP
View
B+
Retailer 13
-
$54,054 AUD
$37,970 USD
View
B+
Retailer 14
-
$56,012 AUD
$39,345 USD
View
B+
Retailer 15
-
$56,993 AUD
€38,128 EUR
View
B+
Retailer 16
-
$57,265 AUD
$40,225 USD
View
B
Retailer 17
-
$60,161 AUD
$42,260 USD
View
B
Retailer 18
-
$66,087 AUD
ZAR 749,958 ZAR
View
B
Retailer 19
-
$75,441 AUD
£41,727 GBP
View
Most Expensive
B
Diamond Quarter
2.5SI1D1562EF73N · Oct 29
$78,988 AUD
£43,689 GBP
View
19 more retailers have this diamond
Prices start from $43,023 AUDSave up to $35,965 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+
2.50ct Round
$43,023 AUD