A centered biaxial optic axis figure has a curved isogyre extending from the northwest to southeast quadrants

Question:

A centered biaxial optic axis figure has a curved isogyre extending from the northwest to southeast quadrants and is convex toward the northeast quadrant. On inserting a first order red interference filter, the region to the northeast of the isogyre turns yellow and to the southwest of the isogyre turns blue. What is the optic sign of the mineral?

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question
Question Posted: