Citrine is a yellow gemstone which is a substitute for yellow sapphire. As per astrology, blue sapphire and yellow sapphire should not be worn together. So, blue sapphire and citrine should not be worn together. For your information, please revert to list of anti-gemstones.
Astrologically, blue turquoise stands for Saturn/Shani.
It is not advised to wear blue turquoise with any other stone.
Citrine and Carnelian gel with each other.
Although, you should note that these stones are not considered to be of much importance in Indian Astrology. Therefore, you can wear them as cheaper alternatives to the costly gemstones and expect a bit differed and delayed result with some hindrances. It is always advisable to only wear the gemstone which you need to.
Wishing you good luck and may God bless you, above all?