Hello Charlsie, I’m glad that you chose Mearto for your online appraisal request, Considering the photographs, overall pattern, frame and the composition, I concluded that this is a Coromandel Lacquer Chinese Screen made in Tianjin around 1940's. So, this piece dates back to mid-century not the 19th century for sure. 19th century items are very very rarely marked as made in China and almost all examples are porcelain dishes made fro export purposes. So, these pieces was not labeled as such back in 19th century. Also, there is no jade or ivory in the composition. The surfaces you referred as jade and ivory are all soapstone carved details. Soapstone was used ehavily in the screens starting from the 18th century due to it's suitable texture for carving. Ivory was almost never used in any piece this heavily in the mid-century, so the details are definetely not ivory. Mother of the pearl on the other hand is used in this pieces decoration for enhancing the design. Coromandel lacquer technique was used from 16th century, these pieces can vary in number of panels up to 12, most are 6 and others like yours are 4. The panels are softwood as it does not shrink or expand as hardwood does and therefore supports the screen. Entirely handmade, a clay surface was created by the artists on the wood. Tianjin have the reputation of making quality screens from Art Deco era to mid-century. Most panels are 72" tall like yours. Dimensions: 72 Inches Tall, 64 Inches High, each panel is 16 Inches Wide. Condition: Very good condition without any stated fault. Provenance: Inherited. Hand carved and hand painted details, all entirely hand made. 600-800$ Please don’t hesitate to reach us again for more online appraisals on your precious items, thank you for choosing Mearto.