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We have observed IRAS06468-0325 obtaining optical and infrared images throughIJHKs and L' filters, K-band low-resolution spectroscopy, together withmillimetre line observations of CO and CS. IRAS06468-0325 has a very unusualand enigmatic morphology with two components: a bright, close to point-likesource (the diamond) and a sharp-edge ring-like structure (the ring). Thesource is not detected in the optical, at wavelengths shorter than the I-band.The diamond is seen in all the imaging bands observed. The ring-like structurein IRAS06468-0325 is clearly seen in the I, J, H, and Ks. It is not detected inthe L'-band image. Infrared colours of the diamond are compatible with excesscircumstellar emission and a young stellar nature. A strongly non-gaussian andmoderately bright CO(1-0) and {13}CO(2-1) lines are seen towardsIRAS06468-0325, at v_{LSR} of 30.5 km s{-1} (corresponding to a kinematicdistance of 3 kpc). Very weak C{18}O(2-1) and CS(2-1) lines were detected.K-band spectra of the diamond and of the ring are similar both in the slope ofthe continuum and in the presence of lines supporting the idea that the ring isreflected light from the diamond. With the current data, a few differentscenarios are possible to explain the morphology of this object. However, theavailable data seem to favour that the morphology of IRAS06468-0325 correspondto a young stellar multiple system in a transient stage where a binaryco-exists with a circumbinary disc, similar to the case of GG Tau. In thiscase, the sharpness of the well-defined ring may be due to tidal truncationfrom dynamic interactions between components in a binary or multiple stellarsystem. IRAS06468-0325 may be an important rare case that illustrates ashort-lived stage of the process of binary or multiple star formation.

A "diamond-ring" star: the unusual morphologic structure of a young (multiple?) object