3.7 x 1.0 x 0.5 cm (largest). An excellent 2-piece set of artistic and aesthetic silver specimens from the Elura Mine of Australia. These tapered, doubly terminated groupings of spinel-twinned silver crystals look like quills or feathers. Unusually, both crystals are folded, giving the appearance of hollows or grooves. These came out in the early 1990s, with very few since. A very fine representation of classic silver crystals.