Keep two things in mind, your diamond will last forever, you will want to feel good about the diamond you chose long after it has been paid for, and you will have many other expenses, keep some actual money on hand.
Shape There are many standard shapes, it’s your preference. What shape appeals to you now and will it likely appeal to you in the future? The more unusual the shape the more likely you may change your mind over time but maybe not.
Size The more weight (carats) - the more cost. Size will have to be balanced with the clarity and color grades that you choose.
Clarity The Fewer natural inclusions in a diamond, the lighter their color and the further they are from the center of the diamond, the more cost. Clarity will have to be balanced with the size and color grade that you choose.
Color The less color, the more cost. Most diamond have at least a tinge of color, typically yellow, possibly brown or grey. Color will have to be balanced with the size and clarity grade that you choose. Fancy color diamonds are something else; they usually have very strong color and a very high price.
Cut A diamond’s proportions will affect the amount of light returned to your eye and, therefore, affect the apparent brightness and sparkle of the diamond. The angled facets of the diamond act as mirrors bouncing light through and then out of the diamond. Most diamonds are well cut but watch out for diamonds with a very wide top surface (table facet) or a very thick outer band (girdle facet).
Many real, natural diamonds glow (fluoresce) under black light (ultraviolet light). The most common colors of fluorescence are bluish white or yellow. This is a reaction caused by a natural movement of some of the electrons within these particular diamonds. The only reason this fluorescence may affect a diamond’s value is if. As a result of the strength of the fluorescence, there is a slight hazy look to the clean diamond.
Diamonds is the hardest gemstone available; you will not be able to scratch it except with another diamond. Diamond is not the toughest gemstone available; it is possible, but unusual, that a diamond will chip or break if it is hit hard enough at just the right spot.
There are a great many beautiful colored gemstones that are not terribly expensive but deserve a position of prominence in jewelry. Why aren’t they frequently used? Because customers don’t ask about them because jewelers don’t promote them because customers don’t ask about them.
Ammo lite Very colorful in the way bright opal shows off its fire and they are found in Alberta.
Fire Opal Very colorful in the way bright opal shows off its fire and they are found in Alberta.
Ammo lite Bright orange from Mexico.
Peri dot Yellow Green, often from Arizona.
Spinel Red similar to ruby and blue similar to sapphire.
Iolite Strong Violet.
Oregon Sun Stone Orange or red, both with bright sparkling aventurescence.
Garnet So much more than dull, dark red, varieties of blue-green to yellow-green and red-orange to yellow-orange, all strong bright colors.
Moon Stone Usually cut as oval cabochons to enhance the effect of adularescence, a patch of blue light flowing over its surface as the stone moves.
Tourmaline Rich colors in pink, yellow, red, blue or green.