HTC promised to adorn the U Ultra with a Sapphire glass, specifically for the top end 128GB model. That model will launch in Taiwan first - next week on March 28. However, the price stings a bit. The 64GB option with regular Gorilla Glass 5 cost NTD 23,900, the equivalent of $780/730. The 128GB/Sapphire option goes up to NTD 28,900, $945/880, that's a solid 20% markup. More importantly, it's well over the $100/100 premium we're used to paying when going up in storage, even if it's from 64GB to 128GB. Sure, Sapphire is expensive and hard to manufacture, but the HTC U Ultra is hardly...
Source: http://www.gsmarena.com/htc_u_ultra_with_sapphire_glass_launches_next_week_at_a_steep_price_-news-24065.php