Questions & Answers about Bu taşlar, karat ve yansıma açısından çok değerlidir.
How does the word açısından literally translate, and what are its exact suffixes here?
The root is açı (angle). Adding the third-person possessive suffix -sı makes it açısı (its angle). We then add the ablative case -dan (from) with the buffer letter -n-, resulting in açısından. Literally meaning "from its angle," this structure is the standard way to express "in terms of" or "from the perspective of" in Turkish.
Does the postposition açısından apply to both karat and yansıma?
Yes. Because karat and yansıma are joined by the conjunction ve (and), they form a single phrase. The postposition açısından correctly applies to the entire group, so you don't need to repeat it as karat açısından ve yansıma açısından. Notice how both words remain bare nouns before it, which is the rule for this postposition.
How is the noun yansıma formed?
It is a verbal noun created from the verb root yansı- (to reflect). By adding the -ma suffix, the action of reflecting becomes the noun "reflection." This is a very common pattern you will recognize from creating gerunds/infinitives, but here it functions purely as a permanent noun.
Why does the sentence end with değerlidir instead of just çok değerli?