Silver 10000 to 8904 -- 8990 10015 Marble white ---- to 8305 -- 8424 7194 Gres ---- to 6242 -- 7333 5838 Lead ---- to 6051 -- 7947 4940 Tin ---- to 6777 -- 6240 5666 Stone calcareous soft ---- to 5536 -- 7719 4425 Clay ---- to 5484 -- 7458 4373 Bismuth ---- to 5343 -- 7547 4232 Antimony ---- to 5246 -- 6608 4135 Chalk ---- to 3729 -- 5862 2618 Gypsum ---- to 3409 -- 4261 2298 SILVER, with Marble white 10000 to 8681 -- 9200 Marble common ---- to 7912 -- 9040 Stone calcareous hard ---- to 7436 -- 8580 Gres ---- to 7361 -- 7767 Glass ---- to 7230 -- 7212 Lead ---- to 7154 -- 9184 Tin ---- to 6176 -- 6289 Stone calcareous soft ---- to 6178 -- 6289 Clay ---- to 6034 -- 6710 Bismuth ---- to 6308 -- 8877 Porcelain ---- to 5556 -- 5242 Antimony ---- to 5692 -- 7653 Oker ---- to 5000 -- 5668 Chalk ---- to 4310 -- 5000 Gypsum ---- to 2879 -- 3366 Wood ---- to 2253 -- 1864 Pumice-stone ---- to 2059 -- 1525 WHITE MARBLE, with Marble common 10000 to 8992 -- 9405 Stone hard ---- to 8594 -- 9130 Gres ---- to 8286 -- 8990 Lead ---- to 7604 -- 5555 Tin ---- to 7143 -- 6792 Stone calcareous soft ---- to 6792 -- 7281 Clay ---- to 6400 -- 6286 Antimony ---- to 6286 -- 6792 Oker ---- to 5400 -- 5571 Gypsum ---- to 4920 -- 5116 Wood ---- to 2200 -- 2857 COMMON MARBLE, with Stone hard 10000 to 9483 -- 9665 Gres ---- to 8767 -- 9273 Lead ---- to 7671 -- 8590 Tin ---- to 7424 -- 6666 Stone soft ---- to 7327 -- 7959 Clay ---- to 7272 -- 7213 Antimony ---- to 6279 -- 8333 Oker ---- to 6136 -- 6393 Chalk ---- to 5581 -- 6333 Wood ---- to 2500 -- 3279 HARD CALCAREOUS STONE, with