Low-dimensional quantum magnets are interesting because of the emerging collective behavior arising from strong quantum fluctuations. The study of 1D systems in magnetic fields is of particular interest, because the combination of external field along with strong quantum fluctuations can stabilize novel ordered phases or induce a quantum phase transition. Here we propose to explore magnetic structure and spin dynamics of green dioptase, which contains weakly coupled S = 1/2 chains of Cu2+ ions. In particular we will focus on evolution of magnetic excitations across the field-induced phase transition at Bc = 12.5 T and details of magnetic structure above the Bc. These results, together with thorough thermodynamic measurements, would help us to explore the ground state phase diagram of the weakly coupled antiferromagnetic spin-1/2 chains realized in green dioptase.