Layalina Concentrated Attar
The final category of oil perfume is that of concentrated perfume oils.  You might get to this section and groan.  After all, are attars and mukhallats not concentrated perfume oils?  The short answer is that while all attars are, by their very nature, concentrated perfume oils, not all concentrated perfume oils are attars.  For example, BPAL’s beloved Snake Oil, while most definitely an oil-based perfume, is not an attar.  Neither is Sballo by Bruno Acampora, Café Noir by Ava Luxe, Santal 33 perfume oil by Le Labo, Choco Musk by Al Rehab, or meltmyheart by Strangelove NYC.  Cheap oil dupes of popular Western fragrances like Aventus or Sauvage are not attars either, even though many people call them that.  In other words, while many perfumes come in oil form, it is not the oil format that makes an attar an attar.