  We seek to explain both the seeming observation of dark matter by the
seasonal variation of the DAMA-LIBRA data and the observation of "electron
recoil" events at Xenon1T in which the liquid Xe scintillator was excited by
electrons - in excess to the expected background - by the same dark matter
model. In our model the dark matter consists of bubbles of a new type of vacuum
containing ordinary atomic matter, say diamond, under high pressure ensured by
the surface tension of the separation domain wall. We also seek to explain the
self interactions of dark matter suggested by astronomical studies of dwarf
galaxies and the central structure of galaxy clusters. The interaction with
matter in the shielding is responsible for slowing the dark matter down to a
low terminal velocity, so underground detectors have insufficient energy for
detection. Further we explain the "mysterious" X-ray line of 3.5 keV, even the
3.5 keV X-ray radiation from the Tycho supernova remnant. The DAMA-LIBRA and
Xenon1T experiments see decaying dark matter pearls. Both these underground
experiments see events with about 3.5 keV energy, just the energy of the X-ray
line. We fit numerically the cross section over mass ratio for the self
interaction of the dark matter as observed in the study of dwarf galaxies and
find the size of the pearls to be rather close to the smallest possible in our
model. However DAMA cause some problem to get heavier pearls. Also the total
energy of the dark matter pearls stopped in the shield is reasonably matching.
Accepting the different phases of the vacuum the model could be realized inside
the Standard Model, our whole scheme could be realized inside the Standard
Model.
