Naturally formed epitaxial diamond crystals in rubies

Gyeong Su Park, Sung Chul Bae, Steve Granick, Jang Ho Lee, Sang Duk Bae, Taekyung Kim, J. M. Zuo

Research output: Contribution to journalArticlepeer-review


Materials inspired by nature comprise a running theme of modern science. Among the crystals that can be formed, diamond is perhaps most emblematic. In the conventional thinking, natural diamonds form only under high-pressure and high-temperature conditions. Here we show a new, natural form of diamond crystals of high quality that are epitaxial with their ruby substrate. Diamonds in rubies are rare; heteroepitaxial diamonds are twice as unexpected. Epitaxy suggests that the natural diamonds in the rubies were formed after ruby crystallization in a thermodynamically diamond stable region. This striking natural control over diamond epitaxy suggests a general strategy by which to form naturally-inspired, gem-quality crystals.

Original languageEnglish (US)
Pages (from-to)397-400
Number of pages4
JournalDiamond and Related Materials
Issue number2
StatePublished - Feb 2007


  • Diamond
  • Epitaxy
  • Raman spectroscopy
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces


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