This idea is not new. We have already seen Crystal edition of Galaxy S II, Galaxy S III mini and Galaxy S4 Galaxy S II, Galaxy S III mini and Galaxy S4. Also Swarovski-studded back covers for the Galaxy Note 3. According to the reports the crystal version of the Galaxy S5 will be released by next Month in May.
Also the company released a teaser video of the edition which you can see below. The video was posted by the Samsung mobile Korea channel and not by the international channel of the company. So chances are there that it might be a limited release only.