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Radiant|Natural|GIA

1.78ct G SI1 Radiant Natural Diamond

VG • G/SI1 • GIA 14918943

Certificate GIA 14918943

Diamond specifications and retailer prices

From $12,781 USD
£10,063 GBP
As of October 28, 2026
Save $5,695 USD (31%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $18,476 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.78ct natural radiant diamond

This 1.78ct natural radiant sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 14918943. Listed at 3 retailers as of October 28, 2026, with prices from $12,781 to $18,476, a $5,695 spread on the same certified stone. MOH London lists it at $18,476. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.78
Carat
G
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 14918943
Dimensions6.86 × 6.70 × 4.78 mm
L/W Ratio1.02
Culet sizeNone
Cert comments
Additional clouds are not shown. Pinpoints are not shown.
Key to symbols
Feather, Cloud, Chip
Top View
6.86 mm6.70 mm1.78 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 14918943
Side View
Table 66.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 71.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 28
Current: $18,476 USD|Low: $12,781 USD|High: $22,023 USD|Avg: $17,021 USD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
October 29, 2026
Retailer 3$12,781 USD
Retailer 2$14,803 USD
MOH London$18,476 USD
Retailer 4$22,023 USD

41 data points across 4 retailers

3 retailers$12,781 USD to $18,476 USD

B
Cheapest Retailer
-
$12,781 USD
£10,063 GBP
B
Retailer 2
-
$14,803 USD
€14,098 EUR
View
Most Expensive
B
MOH London
63BD051D9 · Oct 29
$18,476 USD
£14,548 GBP
View
2 more retailers have this diamond
Prices start from $12,781 USDSave up to $5,695 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
1.78ct Radiant
$12,781 USD