The opening of the will

The notary waits in the castle of Liebhofen for the relatives of the lately deceased earl. Consecutively, the heirs arrived in the afternoon hourly.
In the dense fog, the last person arrived after the twilight.

The opening of the will starts in the library. In the middle of the room stands a round table. Equally around the table stands six chairs for the heirs. The chairs were provided with numbers continuously and were assigned to the heirs. All the heirs have at the right hand a ring containing a stone.

The servants, which were employed in the castle, are excluded from the meeting. However, they listen at the door, because they want to know, who will inherit the castle. The servants hear the following conversation scraps:

Ronnie, his ring contains the turmalin, sits immediate left from Friedrich.
The Ukrainian sits immediate left from the person with the ring, that contains the sapphire, and is one year older than the person with the ring, that contains the emerald.
The person, who inherits the yacht, arrived in the castle one hour before the person with the ring, that contains the ruby.
The person with the ring, that contains the opal, inherits the money and sits beside Arthur, who arrived at 16:00 o'clock in the castle.
The Frenchman sits beside the person with the ring, that containes the sapphire.
The German sits opposite from the person, who inherits the castle.
The person, who is 28 years old, arrived one hour before the person, who sits on the place with the number 5.
Between the person, who is 24 years old, and the person with the ring, that contains the brilliant, no other person arrived in the castle.
The person, who sits on the place with the number 1, arrived one hour in the castle before the person with the ring, that contains the sapphire.
The Hungarian is 26 years old.
The Italian sits on the chair with the number 6.
The person, who inherits the airplane, is 23 years old.
Bernhard is 25 years old.
Markus inherits the fleet of vehicles.
The Austrian wears the ring, that contains the brilliant.
The person, who arrived at 18:00 o'clock as last, sits on place 4.
The person, who sits on place 2, inherits the company.
The person, who is 27 years old, arrived at 13:00 o'clock.

From these hints, the servants could derive all information unequivocally, because they knew in which direction the chairs were provided with numbers.

Task: Name the age, the nationality, the stone in the ring and the heritage for each person.

Attributes	Values
Names	Arthur; Bernhard; Eduardo; Friedrich; Markus; Ronnie
Stone	brilliant; emerald; opal; ruby; sapphire; tourmaline
Arrival time	13:00; 14:00; 15:00; 16:00; 17:00; 18:00
Age	23; 24; 25; 26; 27; 28
Nationality	Austrian; Frenchman; German; Hungarian; Italian; Ukrainian
Heritage	airplane; company; castle; fleet of vehicles; money; yacht