RapNet recognizes these GIA diamond types: Ia, IaB, Ib, IIa, Ib, and Pink.
These diamond-type values are automatically synced from the GIA database when uploading GIA-graded diamonds to RapNet so there is no need to add the field name "Diamond Type" to upload this value.
This article explains:
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Search Type IIa Diamonds
Buyers can specifically search for Type IIa diamonds in both RapNet search forms under Preferences'.
Diamond Type in Diamond Search Results
Diamond type is included in the diamond details and diamond item page.
Add a Diamond Type column in your search results:
Sort by Diamond Type