The Diamond in the Rough is an Orion-Class Star Clipper owned by the Rogue Trader Zacchaeus of House Arioch. It has been in his family for three generations.

The Orions are something of a rarity amongst the Imperium's starships; a fast transport or star-clipper. Though they are designed for cargo, their lean forms, raked bows, and powerful drive tubes are less optimized for cargo hauling and more designed for traveling at speed. Orion-class starships are constructed to transport smaller, high-value cargoes that must reach their destination quickly or through hostile territory. Rather than rely on armed escorts, Orions travel alone. They trust in their speed to see them clear of most predators, and count on their weapons to send off those quick enough to keep up. Often they are successful, but Orions do have one major drawback. The redundant internal bulkheads and exterior armor that would normally be added to human ships has been forgone in order to increase speed and cargo capacity. As a result, a few stiff hits can easily cripple an Orion.

The massive voidship is very much like a city with three separate wards:

Officer’s Ward
Navigator’s Tower
Armored Bridge
Officers’ Quarters
Banquet Hall
Observation Deck
Cathedral
Librarium
Emergency Bridge

Deck Town
Augur Arrays
Auspex Tower
Armory
Barracks
Main Supply Vault
Infirmary
Hangar
Macrocannons

Down Below
Engineerium
Maintenance Deck
Two Engine Cores
Fusion Reactor
Warp Drive
Four Cargo Bays
Dark Decks
Capital Ram