Gravestone Symbolism
These are a few of many motifs found on gravestones with some of the commonly held interpretations of their symbolism.

Anchor/Ships Hope or Seafaring profession 
Angel, Flying
Angel, Trumpeting
Angel, Weeping
Rebirth; Resurrection.
Resurrection
Grief and Mourning
Arches Victory in Death
Arrows Mortality 
Bird
Bird, Flying
Eternal life
Resurrection
Book Representation of a holy book
A pair of Holy Books  on Mormom (LDS) headstones indicates the Bibleand Book of Mormon
Three Holy Books  on Mormom headstones indicates the Bible, Book of Mormon, and Doctrine & Covenants -- all of which are scripture to the LDS Church.
Bouquets/Flowers Condolences, grief, sorrow 
Broken Column Loss of Head of Family 
Broken Ring Family Circle Severed 
Buds/Rosebud Morning of Life or Renewal of Life 
Bugles  Resurrection and the Military
Butterfly  Short-lived; Early Death
Candle being Snuffed  Time, mortality 
Cherub Angelic
Clouds atmospheric veil which conceals God from his worshipers
Coffin Mortality; signified the passing away of the flesh, used for its entombment and the ultimate triumph of death
Columns and Doors Heavenly entrance
Corn Ripe Old Age
Cross Emblem of Faith 
Crossed Swords  High-ranking military person
Crown honors glorified souls and angels, or points to the triumph of death, when it caps a winged skill
Cup or Chalice The Sacraments
Darts Mortality
Dove
Dove, Flying
Innocence, Gentleness, Affection, Purity 
Resurrection
Drapes Mourning; Mortality
Father Time Mortality
Flame or Light Life; Resurrection
Flower
Flower, Severed Stem
Fragility of life
Shortened life
Flying Birds Flight of the Soul
Fruits Eternal plenty 
Full-Blown Rose Prime of Life
Garlands Victory in death 
Hand, Pointing Up
Hands, Clapsed
Pathway to heaven; Heavenly reward
The goodbyes said at death
Hand of God Chopping Sudden Death
Handshakes Farewell
Harp Praise to the Maker
Hearts Soul in Bliss or Love of Christ 
Horns The Resurrection 
Hourglass
Hourglass, Flying
Passing of time
Time flies
Hourglass w/Wings of Time Time Flying; Short Life
Imps Mortality
Ivy Friendship and Immortality 
Lamb Innocence
Laurel Fame or Victory 
Lily or Lily of Valley Emblem of Innocence and Purity
Lion Courage; The Lion of Judah
Morning Glory Beginning of Life 
Oak Leaves & Acorn Maturity, Ripe Old Age
Open Book/Bible Deceased Teacher, Minister, etc.
Palm Branch  Signifies Victory and Rejoicing
Picks/Shovels Mortality
Poppy Sleep
Portals Passageway to eternal journey
Rod or Staff Comfort for the bereaved.
Rooster Awakening; Resurrection
Roses Brevity of earthly existence 
Scythe Death; The divine harvest
Seashell Resurrection; Life everlasting; Life's pilgrimage
Sheaf of Wheat Ripe for Harvest, Divine Harvest, Time
Shells Pilgrimage of Life 
Skull
Skull/ Crossed Bones
Skeleton
Mortality
Death
Life's brevity
Snake (Tail in Mouth) Everlasting life in heaven
Spade Mortality; Death
Sun Rising
Sun Shining
Sun Setting
Renewed life
Life everlasting
Death
Star guidance for the soul
Stars & Stripes Around eagle Eternal Vigilance, Liberty
Thistles Remembrance; Scottish descent
Tombs Mortality
Tree
Tree Sprouting
Severed Branch
Tree Stump
Tree Trunk
Tree Trunk Leaning
Life
Life everlasting
Mortality
Life interrupted
Brevity of life
Short interrupted life
Trumpeters Heralds of the Resurrection
Torch Inverted Life Extinct 
Tree Stump w/Ivy Head of Family; Immortality
Urn with Blaze Undying Friendship 
Urn with /Wreath or  Crepe Mourning 
Wheat Strands or Sheaves  The divine harvest
Weeping Willow Emblem of Sorrow 
Willows Earthly Sorrow
Winged Effigies Flight of the Soul 
Wreath
Wreath on Skull
Victory
Victory of death over life