This is a incredibly rare Montana sapphire a finished stone over 6ct is in the true pinnacle ranges of size and for it to have great color and these unique color striations its beyond rare. The clarity is great but the color is really what makes this stone it stands out without being to much and its completely unique. This is a collectors gemstone to be sure its dimensions are 12.7x6.9mm 6.16ct BLUE TIGER STRIPED MONTANA SAPPHIRE