We have measured magnetic properties of high quality Tl2Ba2Cu1O6+δ 90 K tetragonal superconducting and orthorhombic metallic non-superconducting ceramics. The AC susceptibility shows distinct intra- and intergrain transitions down to H=0.004 Oe rms. The field cooling measurement at 20 Oe shows a sharp transition at 90 K and 50% of full flux exclusion at 5 K. At T>150 K, i.e. above the region where superconducting fluctuations contribute, the normal-state susceptibility is temperature independent and diamagnetic with a value of −5×10−8 emu/g. The intergrain critical current densities determined at B=1 T, using Bean's critical state model, are very low, 6×103 A/cm2 at 5 K and below 1 A/cm2 at 40 K.