Handcrafted ceramic mug with diamond motifs

This item appears to be a handcrafted ceramic mug featuring a globular or pot-bellied body with a slightly flared rim and a robust pulled handle. The glaze composition is multi-tonal, consisting of an ochre-yellow rim and handle, a vivid cobalt-blue neck band, and a dark brown or black lower body. The belly of the mug is decorated with a series of blue-and-white diamond or lozenge-shaped motifs, which seem to be applied using a cut-out or wax-resist technique. The interior is finished with a pale cream or off-white glaze. The construction displays characteristics consistent with studio pottery, including visible throwing lines on the interior and a slightly irregular handle form. Regarding the user-provided note of "KAI 90," this may refer to a maker's mark or date (1990) often found on the underside of such vessels, but since the base is not visible in the image, this claim remains unverified and subject to physical inspection. Conditioning appears fair with some visible irregularities in the glaze application near the rim, which are likely intentional artifacts of the hand-glazing process rather than post-production damage. Identification is based on stylistic features as no signature is visible in the provided view.

Based on my visual analysis of the provided image, I have examined a handcrafted ceramic mug featuring a multi-tonal glaze and geometric diamond motifs. Per the user's submission, this item is attributed to a maker or date mark 'KAI 90'. While the stylistic features—such as the visible throwing lines and slightly irregular handle—are consistent with studio pottery of the late 20th century, I cannot verify the 'KAI 90' mark as the base is not visible. Within the current market, works of this style are valued primarily on aesthetic appeal and utilitarian function unless a specific studio potter can be identified. If the 'KAI 90' attribution refers to a recognized regional artist, the value sits at the higher end of the $40-$85 range. However, this estimate is a working hypothesis and assumes the mark is consistent with a known studio potter. If the piece is an unattributed domestic production or the mark is incidental, the value would likely decrease to $15-$25. The condition appears fair, though glaze irregularities near the rim suggest a handcrafted process rather than damage. To confirm this valuation, a physical inspection is required to view the underside mark, assess the tactile quality of the glaze, and check for hidden structural cracks. Furthermore, provenance documentation would be necessary to increase professional confidence in the attribution. Without such verification, this estimate remains a reflection of the general market for mid-to-late 20th-century artisan stoneware.