mod minimalist glass block vases, hand blown seeded glass cubes w/ keyhole window

I love the shape of these modern art glass vases, and the warm amber color just glows in the sunlight! They're very heavy, with a bubble 'seeded' texture to the glass throughout. This listing is for the 'pair' of vases as shown.

The larger rectangular shaped vase measures 9 1/2" tall x 6" x 3". The smaller square measures 7 3/4" tall x 5 3/4" x 3". Both are in very good clean condition without damage. No marks or signatures that I could see, but I'd guess the vintage at around 15 - 20 years.