© 2015 Elsevier B.V. The ageing and stability behaviour of Bentonite slurries were evaluated under the influence of Mg2+, Ca2+ and Ba2+ ions at concentration ranging from 0.005 to 1M. Stable gels were formed at low metal ion concentration of +, K+ and Cs+ ions. Also the settling layer of divalent metal ion weakened gels did not consolidate as effectively. The stability time of these weakened gels was found to decrease with increasing hydration bond length of the divalent metal ions, i.e. Ba(II)0.02M Mg2+, Ca2+ and Ba2+.