Color Change Sapphire Pairs Perfectly With The Natural Tanzanite In This Ring. In 925 Solid Sterling Silver. Features: ~Size: 8. ~8.77 ctw Oval Shaped Color Change Sapphire (Lab-Grown) Gemstone Prong Set. ~0.33 cttw (4) Marquise Shaped Natural Tanzanite Gemstones Prong Set. ~925 Solid Sterling Silver. ~Comfort Style Band. ♡New Comes Boxed♡ ☆Fun Fact☆ Color-Changing Sapphire: Exhibits a unique phenomenon showing its rare stunning beauty differently under different lighting. With unique hues from pinkish purples to blues. Tanzanite: One of the rarest gemstones on the planet! Only discovered by happenstance and only found in the Merelani Foothills of Tanzania. Tanzanite is the blue to violet variety of zoisite. Green or pink varieties of this gemstone are very rare. Tanzanite ranks 6.0 to 7.0 on the Mohs hardness scale. The best tanzanite displays a transition from blue to violet. Modern gemstone for December birthdays and 24th Anniversary. Lab-Grown: Not Naturally Mined! It has been grown in a lab with the same chemical elements as in nature. Lab grown stones produce the same chemical, optical & physical properties as natural stone. ☆Perfect For☆ ~Wedding ~Engagement ~Promise Ring ~Anniversary ~Birthday ~Valentines Day ~Christmas ~Special Gift For That Special Woman In Your Life! ~Special Treat For Yourself!!!