I don't think there is a Japanese word for "diamond". At least Google Translate translates it as 'daiyamondo'. In Chinese, 'diamond' translates to 'Zuan Shi'. But if you want to say 'red jewel', perhaps "akai houseki" (or possibly "akai no houseki" -- though I would go with the former) would work. I hope that helps!
Momotsuki
kuroi daiyamando
pinku no neko or momoironeko
桃色の竜 /mo mo i ro no ryuu/ would mean 'pink dragon' in Japanese.
daiyamondo, kongouseki, naiya, kongouダイヤモンド=diamond
As an adjective, pink is pinkuiro noAs a noun, pink is pinkuiro
Momotsuki
In Japanese "pink" is ピンク (pinku) and "ninja" is 忍者 (ninja), so to say "Pink ninja" it is ピンク忍者 (pinku ninja).
kuroi daiyamando
pinku no neko or momoironeko
桃色の竜 /mo mo i ro no ryuu/ would mean 'pink dragon' in Japanese.
a pink diamond tattoo mean love.
The weight of a pink diamond can vary greatly depending on its size and quality. Pink diamonds can be found in a wide range of weights, from a fraction of a carat to several carats. The weight of a pink diamond is typically measured in carats, with one carat being equivalent to 0.2 grams.
A pink diamond is a fancy-coloured diamond, generally used for adornment in jewelery.
A half carat average clarity pink diamond can cost as much as 5,000 dollars. Pink diamond worth is dependent on size, cut and clarity.
You may say 'daiya' or 'kongouseki,' written: ダイヤ 金剛石
As the name suggest, they are actually pink.