The yellow sapphire is a gemstone for Jupiter. Some points relevant to this stone are as under.
[10] SYNTHETIC YELLOW SAPPHIRE
Synthetic yellow sapphires are available almost all over the world.
Nowadays imitation yellow sapphire can easily be made in the factories and are very common in the use of the imitation jewelries. They are chemically dyed to give the required colour and they are made of glass, plastic materials and some times also by using semi precious gems stones.
One should try to avoid using these synthetic gems.
[14] SIGNS OF BAD QUALITY YELLOW SAPPHIRE
(1) A dull yellow gem may cause some health complications.
(2) Straight lines in the yellow sapphire may destroy the family's peace and happiness.
(3) White colour inside the yellow sapphire may cause some health complications to the wearer.
(4) A net-like pattern inside this gem may cause deterioration to the physical and mental health of the wearer.
(5) Black stains in the yellow sapphire may cause financial instability and insecurity for the wearer.
(6) Black spots may prove fatal and dangerous for the wearer's life.
(7) Red spots may cause financial problems for the wearer.
For the remaining 23 points, you can contact us or you can refer to our book “Astrological Science... Your Birthstones and You".