The best crystals for Cancer people (Sun, Moon Rising, & Stellium) & those that are trying to tap into Cancer energy would be crystals that strengthen the best qualities of Cancer energy. While balancing those stifling qualities.
Cancer's home planet is the moon and it represents unconsciousness, the emotional body, intuition, instincts, habits, and mood.
A freed-up cancer is so creative nurturing and intuitive. The thing I've noticed that weighs cancer down the most are their feeling towards themselves and others. Cancer, you must remember you are not your emotions. I know you feel everything so intensely but try remembering the perspective of the observer when you feel the emotions are too much you don't have to become them you can just watch just because you resonate with something doesn't mean it's who you are. In the words of Sri Mooji, "the more you observe the less you entertain the feelings so quickly." Breathe say I am not my emotions and take a moment to just watch the emotion instead of becoming involved with it. observe the emotions and let them be don't interact or react keep it simple. Program your crystals to help you observe instead of attaching.
Decent at reading a room
Can Hold A Grudge
Complicated Relationship With Mother Or Feminine Energy
Red Jasper is a great crystal to help cancers feel grounded a lot of the moodiness and uneasy energy cancer experiences are due to a lack of grounding. Red jasper has a very earthy vibration and can give the watery crab something to grasp onto literally and figuratively when the waves of emotion hit. Think of this crystal-like anchor. Red Jasper resonates with the base chakra and is all about security safety and stability.
Blue Aventurine is a gentle stone that resonates from the mind to the heart, working calmly, rationally, and steadily. It enhances the masculine energy, and is a stone of self-discipline and inner strength. ... Blue Aventurine can be used to help overcome selfishness, childishness, and passive-aggression.
Rose Quartz is an excellent crystal for boosting some of the best traits of people born with Cancer. It is a stone that amplifies compassion and kindness, as well as different types of unconditional love, including self-love. During times when you feel like wallowing in self-pity, grab your rose quartz and place it on your chest where your heart is to help facilitate healing emotional wounds.