Amsterdam Black Diamond
| Cut | Pear Shaped |
| Weight After Cut | 33.74 Carats |
| Weight Before Cut | 55.85 Carats |
| Founded At | Unknown |
This magnificent historical precious diamond is also known as the Amsterdam Diamond. Rough Amsterdam Black Diamond was 55.85 Carats, It was cut in a pear shaped. The weight of Amsterdam Black Diamond is 55.85 Carats. Amsterdam Black diamond was exhibited on the 700th anniversary of the City of Amsterdam in 1975.
Amati Diamond
| Color | Unknown |
| Founded at | Unknown |
| Weight | 31 Carats |
| Present Owner | Unknown |
| Present Location | Unknown |
| Former Owner | Mrs. N. Coffin |
| Weight before Cut | Unknown |
Amati Diamond is 32 Carats. The location from which this magnificent diamond was founded is unknown. Amati Diamond belonged to Mrs M. Coffin but it was stolen in 1949. The present whereabout of this historical diamond is unknown.
Amarillo Starlight Diamond
| Weight | 16.37 Carats |
| Date | 1975 |
| Founded At | Diamonds State Park, Arkansas |
| Present Location | Unknown |
Amarillo Starlight Diamond was founded at Diamonds State Park, Arkansas in 1975 . This magnificent and historical diamond was named after Amarillo. Amarillo is a name of Town in Texas, United States of America. The weight of the diamond is 16.37 Carats.
The owner and the present location of this historical diamond is unknown.
Akbar Shah Diamond
| Cut | Drop Shape |
| Weight | 73.60 Carats |
| Origin | Indian |
| Founded at | Unknown |
| Present Owner | Unknown |
| Present Location | Unknown |