They don’t have to be precisely formed, but they have to be visible.
Most people have some of these shapes on their palm, and that has a special meaning. Vedic interpretation of the lines on the palm gives amazing answers and reveals your true, best qualities.Each of these shapes and symbols has a specific meaning. In addition to the above mentioned - triangle, star and diamond, there are also trident, half moon or crescent, cross and fish. Here is their meaning.
Triangle
People who have this symbol on one of the palms have a special talent. If they have more triangles, small and big ones, this means that they have more talents, and the clearer and more distinguished these triangles are, the more likely it is that they will become famous and respected.
If your line of destiny forms one of the sides of the triangle, it means that you have guaranteed success in your destiny.
Star
This shape usually occurs at the ends of striking lines and is made of more small lines that intersect in one place. The symbol reveals that the person who has it, possesses specific and expressed abilities. If it is at the end of the line of heart, it reveals a person of incredible strength or skill they have in their hands, and if it is on top of the line of life, under forefinger, this is a person of great mental capabilities, dedicated to science, philosophy or religion.
Diamond
If you have a diamond, or shape of rhombus or deltoid on your palm, it means that you are a person with an adventurous spirit. You are unstoppable and always interested in unknown, unlike most people.
People with incredible courage, often careless, because to them it will be more important to reach some kind of answer or new world (Christopher Columbus, Marco Polo, ... must have had a lot of diamonds), than to save themselves and their life. True researchers who like to take risks, and their risk pays to many.
Fish
This shape is similar to a diamond, that is, it’s the same except that it also has a triangle smaller than a rhombus which represents a fishtail. People who have this sign are religious and they express their exploring spirit through their spiritual side. No one can see their adventures, but regardless of that, they are no less important than the visible ones.
Half Moon
If you have two lines that together make the clear shape of half moon or crescent, it means that you have a very interesting gift. Your intuition is so strong that it can literally predict the future, which can often scare you.
This gift brings many problems, such as hypersensitivity or emotional instability, but if a person manages to deal with their inner demons, their knowledge and awareness will overcome other people by far.
Trident
One of the big lines branches off into three parts. This symbol is present with people who have some kind of protection in life. The clearer the shape is and the more there are on the palm, the protection is stronger and more comprehensive.
A person who has one clear trident on each of the big lines, literally has divine protection and nothing can harm them.
Cross
This also indicates religious and spiritual persons, but not prone to exploring the limits of the human spirit, as in the case with those who have the symbol of fish, but it reveals people with some specific spiritual knowledge.