Stone, steel, titanium — we put them all on the Definition Index. Here's what actually holds cold and contours the jaw.
Stone gua sha looks the part but warms in your hand within a minute. Kitsch's stainless tool stays cold long enough to matter and, unlike jade or quartz, won't chip or shatter. The spec that matters here is the steel: the contour fits the jaw and submental area, which is where lower-face puffiness actually sits. Like all gua sha, the depuff is temporary drainage rather than lasting change.
PLANTIFIQUE's jade tool earns its spot the old-fashioned way: a curved edge that tracks the jaw and submandibular line, real stone rather than dyed resin, and tens of thousands of owner reviews that skew strongly positive. Jade warms faster than steel, so you lose the long cold-hold, but for technique-led lymphatic work that's a fair trade. As with all gua sha, the sculpting is temporary depuffing, not permanent change — but as a daily ritual the rubric rewards it highly.
Yeamon pairs a stainless gua sha with a matching steel roller, so you get the long cold-hold of metal across both tools — the spec that actually separates steel from stone. Owner reviews are notably high, and the set covers both contour scraping and rolling drainage. It's heavier than stone and needs drying to avoid spotting, but for steel at a fair price it's a sensible pick. Depuffing is temporary regardless of the tool.
Bargain stainless gua sha that gets the important thing right — being steel, it holds cold far better than stone. The finish is rougher than the Kitsch and the contour is more generic, but for a few dollars it's a legitimate way to try steel gua sha. The depuff is temporary, as with any gua sha.