The King of Diamonds sometimes symbolizes a soldier, or more generally – a man in a dangerous occupation, exposed to risks of injury or violent death (policeman, firefighter, roof-tiler, aircraft pilot and similar professions with elevated risks). For a young woman or a divorced woman, the isolated card means a proposal for marriage from a man in a dangerous occupation.
It also represents a blond man, self-important, haughty, fearsome, deceitful; in a word, a bad man.
It is one of the cards whose meaning depends mostly on the cards surrounding it.
So the number of its exceptions, i.e. special cards that give it a different meaning, is quite varied, as you will see below.

This card announces, having on the right a
Spade ♠: Naughty, quarrelsome man, whom you should be wary of.
Heart ♥: A beginning of a relationship with someone, who is not good for you. If the consultant is married: new acquaintance not to be frequented.
Diamond ♦: Flatterer of which we have everything to fear.
Club ♣: Somebody will try to steal from you.

Having on the left a
Spade ♠: Obstacle in your projects by a blond man.
Heart ♥: Serious suitor. If the consultant is old or married: loving and honest man.
Diamond ♦: Quarrel.
Club ♣: Advantageous offer by a blond man.

EXCEPTIONS.
The King of diamonds placed between two face cards, whatever they may be, means: Disunity, confusion.
With the Jack of DiamondS: News from a young man in a dangerous profession.
Between two SpadeS: Rivalry.
With the Queen of HeartS: Love of a soldier. For married or elderly people: Upcoming acquaintance of an honest man, military.
Having an ace on the right, the usual meaning of the card on the left is nil. Instead, this announces, regardless of the colour of the card on the left – upcoming trip away related to some danger or a man in dangerous business.
The King of Diamonds, between two diamonds, announces the visit of a man from out of town.

The Ace of Diamonds announces a letter (message) that you will receive soon.

Having on the right a
Spade ♠: Bad news.
Heart ♥: Joy and letter from a friend.
Diamond ♦: Business papers.
Club ♣: Expected cash inflow.

Having on the left a
Spade ♠: News of somebody’s death (the news of the person’s death will not cause you any joy or pain, as this person is only known to you, but indifferent).
Heart ♥: Love letter.
Diamond ♦: Intrigues, slander, anonymous letter on your account.
Club ♣: A cash inflow that we no longer counted on.

EXCEPTIONS.
The Ace of Diamonds with the King of Spades, whether on the right or left, announces bad news from a lawyer: monetary claims or a forthcoming trial.
If this card touches the Nine of Spades, news of a death in the family.
If it is between two cards of the same value – delay for all that is expected.

A haughty, jealous, wicked and promiscuous woman, the Queen of Diamonds represents, isolated, your enemy.
However, followed by some cards, its significance is an excellent omen. See the exceptions to this.

This card has on the right a
Spade ♠: Bad intentions of a mean blonde.
Heart ♥: Happy marriage in all respects. Satisfaction in your home.
Diamond ♦: No meaning; card is null.
Club ♣: Gossip, chatter.

Having on the left a
Spade ♠: A slanderous woman and bad morals whose bad intentions you must fear.
Heart ♥: Sincere friend.
Diamond ♦: A slander that will not cause you any harm or trouble.
Club ♣: Jealous, bitter and somewhat thieving woman.

EXCEPTIONS.
Between two aces: Your enemy will come to see you.
Between two cards of the same value: Delayed travel.
Between two spades (seven, eight, nine, ten): Death of a loved one. Revenge and injustice.
With the Eight of Hearts: A girl who has been cheated in love. If Eight of Hearts is touching the Queen of Diamonds, the other card on the right or left does not have any meaning.
With the Queen of Spades: Divorce, widowhood, tears, pain.
With the Jack of Clubs: Stable, happy marriage or sincere friend.