Speech bubble style Testimonials Archive page in Genesis. https://sridharkatakam.com/speech-bubble-style-testimonials-archive-page-in-genesis/

archive-testimonial.php

<?php

// Force full width content
add_filter( 'genesis_pre_get_option_site_layout', '__genesis_return_full_width_content' );

// Remove entry header having title and post info incl. markup
remove_action( 'genesis_entry_header', 'genesis_entry_header_markup_open', 5 );
remove_action( 'genesis_entry_header', 'genesis_do_post_title' );
remove_action( 'genesis_entry_header', 'genesis_post_info', 12 );
remove_action( 'genesis_entry_header', 'genesis_entry_header_markup_close', 15 );

// Remove entry meta from entry footer
remove_action( 'genesis_entry_footer', 'genesis_post_meta' );


// Title and byline in entry content - opening markup
add_action( 'genesis_entry_content', 'sk_title_byline_markup' );
function sk_title_byline_markup() {
	echo '<div class="title-byline">';
}

// Title
add_action( 'genesis_entry_content', 'genesis_do_post_title' );

// Byline and closing markup
add_action( 'genesis_entry_content', 'sk_display_byline' );
function sk_display_byline() {
	echo '<p class="byline">' . get_post_meta( get_the_ID(), '_byline', true ) . '</p>';
	echo '</div>'; // end .title-byline
}

// Display Featured image in entry footer
add_action( 'genesis_entry_footer', 'sk_display_featured_image' );
function sk_display_featured_image() {
	if ( $image = genesis_get_image( 'format=url&size=testifier-thumbnail' ) ) {
		printf( '<div class="testifier-photo"><a href="%s" rel="bookmark"><img src="%s" alt="%s" /></a></div>', get_permalink(), $image, the_title_attribute( 'echo=0' ) );

	}
}

/**
 * Display as Columns. Thanks Bill Erickson.
 *
 */
function be_portfolio_post_class( $classes ) {

	if ( is_main_query() ) { // conditional to ensure that column classes do not apply to Featured widgets
		$columns = 3; // Set the number of columns here

		$column_classes = array( '', '', 'one-half', 'one-third', 'one-fourth', 'one-fifth', 'one-sixth' );
		$classes[] = $column_classes[$columns];
		global $wp_query;
		if( 0 == $wp_query->current_post || 0 == $wp_query->current_post % $columns )
			$classes[] = 'first';
	}

	return $classes;
}
add_filter( 'post_class', 'be_portfolio_post_class' );

// Force excerpts
add_filter( 'genesis_pre_get_option_content_archive', 'sk_show_excerpts' );
function sk_show_excerpts() {
	return 'excerpts';
}

// Modify the length of excerpts
add_filter( 'excerpt_length', 'sp_excerpt_length' );
function sp_excerpt_length( $length ) {
	return 30; // pull first 30 words
}

// Modify the Excerpt read more link
add_filter( 'excerpt_more', 'new_excerpt_more' );
function new_excerpt_more( $more ) {
    return '... <a class="more-link" href="' . get_permalink() . '">more</a>';
}

genesis();

functions.php

// Register new image size for testifier photos
add_image_size( 'testifier-thumbnail', 128, 128, true );

style.css

/* Testimonials Archive page
--------------------------------------------- */

body.post-type-archive-testimonial {
	background: #4fc3a0;
}

.testimonial.entry {
	padding: 0;
	background: transparent;
}

.testimonial.entry .entry-content {
	background: #fff;
	padding: 30px;
	-webkit-box-shadow: 1px 1px 3px rgba(50, 50, 50, 0.23);
	-moz-box-shadow:    1px 1px 3px rgba(50, 50, 50, 0.23);
	box-shadow:         1px 1px 3px rgba(50, 50, 50, 0.23);
	border-radius: 3px;
	margin-bottom: 30px;
	position: relative;
}

.testimonial.entry .entry-content:after {
	/* If box-shadow for the arrow is not needed */
	/*top: 100%;
	left: 50%;
	border: solid transparent;
	content: " ";
	height: 0;
	width: 0;
	position: absolute;
	pointer-events: none;
	border-color: rgba(255, 255, 255, 0);
	border-top-color: #fff;
	border-width: 10px;
	margin-left: -10px;*/

	/* If box-shadow for the arrow is needed */
	/* from http://codepen.io/ryanmcnz/pen/JDLhu */
	content: "";
	position: absolute;
	width: 0;
	height: 0;
	margin-left: -15px;
	top: 100%;
	left: 50%;
	border: 10px solid transparent;
	border-color: transparent transparent #fff #fff;
	-webkit-transform-origin: 0 0;
	        transform-origin: 0 0;
	-webkit-transform: rotate(-45deg);
	        transform: rotate(-45deg);
	box-shadow: -3px 3px 3px 0 rgba(50, 50, 50, 0.15);

}

/* Uncomment the three blocks below if you'd like quotation mark near the beginning of text */

/*.testimonial.entry .entry-content > p {
	padding-left: 24px;
	padding-top: 24px;
	position: relative;
}

.testimonial.entry .entry-content > p:before {
	content: "\201C";
	font-size: 40px;
	font-family: Georgia, serif;
	position: absolute;
	left: 0;
	top: 0;
	color: #aaa;
}

.title-byline {
	padding-left: 24px;
	padding-right: 24px;
}*/

.testimonial.entry .entry-title {
	font-size: 24px;
	margin-bottom: 5px;
}

.byline {
	color: #e37e52;
	font-size: 16px;
	line-height: 1.3;
}

.testifier-photo {
	text-align: center;
}

.testifier-photo img {
	border-radius: 50%;
	box-shadow: 0 2px 2px 0 rgba(0,0,0,0.25);
	border: solid 3px #fff;
}

@media only screen and (max-width: 800px) {
	.testimonial.entry.one-third {
		margin-bottom: 40px;
	}
}