Type IIb blue-tinted natural stones remain the rarest category buyers ask about

Naturally occurring blue-tinted Type IIb diamonds remain the single rarest specification buyers ask about relative to how often one is actually available.

• Type IIb stones get their colour from trace boron and are electrically conductive, a genuinely rare combination that shows up in a very small share of all natural diamonds mined.
• Well-known historic blue diamonds have kept demand for the category high even though genuine, sizeable examples rarely reach the open market.
• Most enquiries end up being redirected either to smaller, fainter blue stones or to lab-grown or treated alternatives once true rarity and pricing are explained.

A genuine Type IIb stone of any real size is a special-order proposition, not something held in standard stock anywhere. Contact us if one becomes available and you'd like to be notified.