Dear Jeffrey,

Thank you for contacting Mearto with your appraisal inquiry. My sincere apologies for the delay with the appraisal.

The presented object appears to be a mixed-media glass artwork with 28 x 28
inches measurements. The painting depicts an abstract motif and was made by David Marshall in the last third of the 20th century.

https://www.liveauctioneers.com/item/136660159_david-marshall-mixed-media-wall-art

Comparable objects were recently offered and sold on the international auction market.
This piece is in good condition and no severe damage is visible in the images provided.
A fair market estimation would be between 70 to 150 USD.
This estimate is based on actual recent past recorded auction sales of comparable items. Retail "asking prices" can be higher and may vary.

With kind regards,
Gregory