Rachel Allan 40506 lamé, mirrors, stone beading prom dresses are offered in Black, Gold, Gunmetal, Royal . $458 is the Formal Approach best price guarantee for style 40506 by Rachel Allan. Shop with confidence, Formal Approach is an authorized Rachel Allan prom dress store. Rachel Allan 40506 is offered in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12.