IX-149 Trefoil Class
B7-D1
IX-150 Quartz
| Name | FY | Laid Down | Launched | Com. | Decom. | Stricken | Yard | |||
| IX | 149 | Trefoil (ex Midnight) | ? | ? | 09.03.1944 | ? | 22.12.1948 | BaHi | ||
| IX | 150 | Quartz | ? | 04.12.1943 | 13.04.1944 | ? | 22.01.1947 | BaHi | ||
| IX | 151 | Silica (ex Bauxite) | ? | ? | 08.06.1944 | 10.09.1945 | ? | BaHi | grounded 10.09.1945 | |
| IX | 152 | Carmita (ex Slate) | ? | ? | 11.05.1944 | ? | 25.09.1946 | BaHi | ||
| IX | 153 | Asphalt | ? | ? | 31.08.1944 | 06.10.1944 | ? | BaHi | grounded 06.10.1944 | |
| IX | 154 | Bauxite | ? | ? | 22.06.1944 | ? | 23.06.1947 | BaHi | ||
| IX | 158 | Limestone | ? | ? | 14.10.1944 | ? | 12.12.1946 | BaHi | ||
| IX | 159 | Feldspar | ? | ? | 11.08.1944 | ? | 28.08.1946 | BaHi | ||
| IX | 160 | Marl | ? | ? | 29.08.1944 | ? | 15.08.1946 | BaHi | ||
| IX | 161 | Barite | ? | ? | 31.08.1944 | ? | 15.08.1946 | BaHi | ||
| IX | 162 | Lignite | ? | ? | 26.09.1944 | ? | xx.08.1946 | BaHi | ||
| IX | 163 | Cinnabar | ? | ? | 26.09.1944 | ? | 03.01.1946 | BaHi | ||
| IX | 164 | Corundum (ex Limestone) | ? | ? | 18.07.1944 | 08.08.1946 | 08.08.1946 | BaHi | ||