IF – Internally flawless – Cut gem: It means the stone is devoid of any visible inclusion with 10X magnification.
VVS – Very Very Slightly included. It means the stone has few inclusions, but visible under 10X magnification.
VS – Very slightly included – It means the stone has very few inclusions, but difficult to see face up. However, if looked more carefully or with a 10X magnification, one would be able to see these inclusions.
SI – Slightly included: The inclusions are clearly visible under 10X magnification and sometimes to the naked eye, but not affecting the brilliance.
I – Inclusions are clearly visible to the naked eye and it impacts beauty and brilliance of the stone.
I2 – I3 – Inclusion significantly impacts brilliance making the stone more suitable for cabochon.
.98 carat White Sapphire 
2.25 carats Parti Greenish Yellow Sapphire 
2.56 carat Blue Sapphire 
2.96 carats Greenish Yellow Sapphire 
2.30 carat Parti Sapphire