Capital gain on old gold & silver sold

Respected Seniors,

Please suggest me for the following:

1). I am having ancestral gold jewellery around 250 grams which I am intending to sell out.I want to know that if I sell it before 31st March 2017 can I save the capital gain by investing the capital gain bond under 54Ec or I will have to pay 20% capital gain after indexation.

2) I am also having some ancestral silver utensils and if I sell the same it will attract any capital gain on it or not.

Thanking in advance.

Regards