It is the last stage of the primordial part of the goldseries and is similar to cancer, the primordial soul.
Nurturing, support, emotional bonding, belonging, roots, source. Ground of your being. The unconscious, feelings, emotion, first emotional attachments to the world. Mothering, emotional and physical nurturing. Experiences and imprinting during infancy and childhood. Family, ancestors, heritage, relationships to the past. Belonging, feeling at home, caring. Feeling supported, that needs are provided for. Insecurities and fears if your needs haven’t been fulfilled.
Bring about the perfect society. Making practical, efficient connections with others on the physical plane. Ambitious, feels pride in accomplishments. Reality, hard facts. Relationship to authority. Serious, determined, disciplined, focused. Fathering, disciplining love. Authority figures. Seeks certainties in life. Want things in concrete. Concerned with the practical relationships to support yourself within society. Not interested in blue sky ideas, needs to bring theory into concrete reality. Knowing the rules and playing the game.
which itself is similar to the whole goldseries.
So here with Tantalum the only two signs that play a role are cancer and capricorn.
The goldseries as a whole has the polarity of formal and depressed, and needs the complementary sign cancer to get to its goal of construction, which is the final purpose of the goldseries.
And stage 5, that has the polarity of claiming and abandon, needs the complementary sign capricorn to get to handling emotions, which is the final purpose of stage 5.