Takara Cultured Diamonds are pure diamonds, grown in a laboratory instead of mined. Thus, like mined diamonds, Takara's are composed of 99.99% carbon, in an isometric crystal structure, same as mined diamonds.
Takara's are *not* mis-labeled cz's, a new form of moissanite, etc. - they are pure diamond that nature grew above ground because mankind created the proper conditions for diamonds to grow.
Because they are real diamond, Takara's come with an independent EGL or GGL fancy color diamond grading report, the same report that is issued with mined diamonds, except a notation that their origin is man-made.