In ancient India, diamonds were items of tremendous cultural and religious significance. Therefore, altering them in any way was considered taboo. Colorless stones were held by only those of the highest caste, and with this, there would have been great economic incentives to enhance a diamond that was not colorless. However, it is probable that there was strong sentiment against altering a stone's color. Although many jewelers do not advertise it, today 90% of emeralds and many sapphires are enhanced to show more brilliant hues. Hadar Diamonds discloses the purity of all it's stones upfront with proper documentation.